diff --git a/src/components/structures/FilePanel.js b/src/components/structures/FilePanel.js
index 6696f3cc0f..23feb4cf30 100644
--- a/src/components/structures/FilePanel.js
+++ b/src/components/structures/FilePanel.js
@@ -116,7 +116,6 @@ const FilePanel = React.createClass({
                     timelineSet={this.state.timelineSet}
                     showUrlPreview = {false}
                     tileShape="file_grid"
-                    opacity={this.props.opacity}
                     empty={_t('There are no visible files in this room')}
                 />
             );
diff --git a/src/components/structures/GroupView.js b/src/components/structures/GroupView.js
index 52680ea5fa..314a36e486 100644
--- a/src/components/structures/GroupView.js
+++ b/src/components/structures/GroupView.js
@@ -482,8 +482,8 @@ export default React.createClass({
             profileForm: Object.assign({}, this.state.summary.profile),
         });
         dis.dispatch({
-            action: 'ui_opacity',
-            sideOpacity: 0.3,
+            action: 'panel_disable',
+            sideDisabled: true,
         });
     },
 
@@ -492,7 +492,7 @@ export default React.createClass({
             editing: false,
             profileForm: null,
         });
-        dis.dispatch({action: 'ui_opacity'});
+        dis.dispatch({action: 'panel_disable'});
     },
 
     _onNameChange: function(value) {
@@ -549,7 +549,7 @@ export default React.createClass({
                 editing: false,
                 summary: null,
             });
-            dis.dispatch({action: 'ui_opacity'});
+            dis.dispatch({action: 'panel_disable'});
             this._initGroupStore(this.props.groupId);
         }).catch((e) => {
             this.setState({
@@ -787,8 +787,8 @@ export default React.createClass({
             </div>;
         } else if (group.myMembership === 'join' && this.state.editing) {
             const leaveButtonTooltip = this.state.isUserPrivileged ?
-                _t("You are a member of this community") :
-                _t("You are an administrator of this community");
+                _t("You are an administrator of this community") :
+                _t("You are a member of this community");
             const leaveButtonClasses = classnames({
                 "mx_RoomHeader_textButton": true,
                 "mx_GroupView_textButton": true,
diff --git a/src/components/structures/LoggedInView.js b/src/components/structures/LoggedInView.js
index 7e6fc05599..5d1d47c5b2 100644
--- a/src/components/structures/LoggedInView.js
+++ b/src/components/structures/LoggedInView.js
@@ -240,11 +240,13 @@ export default React.createClass({
                         oobData={this.props.roomOobData}
                         eventPixelOffset={this.props.initialEventPixelOffset}
                         key={this.props.currentRoomId || 'roomview'}
-                        opacity={this.props.middleOpacity}
+                        disabled={this.props.middleDisabled}
                         collapsedRhs={this.props.collapseRhs}
                         ConferenceHandler={this.props.ConferenceHandler}
                     />;
-                if (!this.props.collapseRhs) right_panel = <RightPanel roomId={this.props.currentRoomId} opacity={this.props.rightOpacity} />;
+                if (!this.props.collapseRhs) {
+                    right_panel = <RightPanel roomId={this.props.currentRoomId} disabled={this.props.rightDisabled} />;
+                }
                 break;
 
             case PageTypes.UserSettings:
@@ -254,7 +256,7 @@ export default React.createClass({
                     referralBaseUrl={this.props.config.referralBaseUrl}
                     teamToken={this.props.teamToken}
                 />;
-                if (!this.props.collapseRhs) right_panel = <RightPanel opacity={this.props.rightOpacity} />;
+                if (!this.props.collapseRhs) right_panel = <RightPanel disabled={this.props.rightDisabled} />;
                 break;
 
             case PageTypes.MyGroups:
@@ -266,7 +268,7 @@ export default React.createClass({
                     onRoomCreated={this.props.onRoomCreated}
                     collapsedRhs={this.props.collapseRhs}
                 />;
-                if (!this.props.collapseRhs) right_panel = <RightPanel opacity={this.props.rightOpacity} />;
+                if (!this.props.collapseRhs) right_panel = <RightPanel disabled={this.props.rightDisabled} />;
                 break;
 
             case PageTypes.RoomDirectory:
@@ -294,14 +296,14 @@ export default React.createClass({
 
             case PageTypes.UserView:
                 page_element = null; // deliberately null for now
-                right_panel = <RightPanel opacity={this.props.rightOpacity} />;
+                right_panel = <RightPanel disabled={this.props.rightDisabled} />;
                 break;
             case PageTypes.GroupView:
                 page_element = <GroupView
                     groupId={this.props.currentGroupId}
                     collapsedRhs={this.props.collapseRhs}
                 />;
-                if (!this.props.collapseRhs) right_panel = <RightPanel groupId={this.props.currentGroupId} opacity={this.props.rightOpacity} />;
+                if (!this.props.collapseRhs) right_panel = <RightPanel groupId={this.props.currentGroupId} disabled={this.props.rightDisabled} />;
                 break;
         }
 
@@ -334,7 +336,7 @@ export default React.createClass({
                     <LeftPanel
                         selectedRoom={this.props.currentRoomId}
                         collapsed={this.props.collapseLhs || false}
-                        opacity={this.props.leftOpacity}
+                        disabled={this.props.leftDisabled}
                     />
                     <main className='mx_MatrixChat_middlePanel'>
                         { page_element }
diff --git a/src/components/structures/MatrixChat.js b/src/components/structures/MatrixChat.js
index 3fa628b8a3..e679276a08 100644
--- a/src/components/structures/MatrixChat.js
+++ b/src/components/structures/MatrixChat.js
@@ -145,9 +145,9 @@ module.exports = React.createClass({
 
             collapseLhs: false,
             collapseRhs: false,
-            leftOpacity: 1.0,
-            middleOpacity: 1.0,
-            rightOpacity: 1.0,
+            leftDisabled: false,
+            middleDisabled: false,
+            rightDisabled: false,
 
             version: null,
             newVersion: null,
@@ -534,12 +534,11 @@ module.exports = React.createClass({
                     collapseRhs: false,
                 });
                 break;
-            case 'ui_opacity': {
-                const sideDefault = payload.sideOpacity >= 0.0 ? payload.sideOpacity : 1.0;
+            case 'panel_disable': {
                 this.setState({
-                    leftOpacity: payload.leftOpacity >= 0.0 ? payload.leftOpacity : sideDefault,
-                    middleOpacity: payload.middleOpacity || 1.0,
-                    rightOpacity: payload.rightOpacity >= 0.0 ? payload.rightOpacity : sideDefault,
+                    leftDisabled: payload.leftDisabled || payload.sideDisabled || false,
+                    middleDisabled: payload.middleDisabled || false,
+                    rightDisabled: payload.rightDisabled || payload.sideDisabled || false,
                 });
                 break; }
             case 'set_theme':
diff --git a/src/components/structures/MessagePanel.js b/src/components/structures/MessagePanel.js
index 5ce36b4b82..2331e096c0 100644
--- a/src/components/structures/MessagePanel.js
+++ b/src/components/structures/MessagePanel.js
@@ -16,6 +16,7 @@ limitations under the License.
 
 import React from 'react';
 import ReactDOM from 'react-dom';
+import classNames from 'classnames';
 import UserSettingsStore from '../../UserSettingsStore';
 import shouldHideEvent from '../../shouldHideEvent';
 import dis from "../../dispatcher";
@@ -78,9 +79,6 @@ module.exports = React.createClass({
         // callback which is called when more content is needed.
         onFillRequest: React.PropTypes.func,
 
-        // opacity for dynamic UI fading effects
-        opacity: React.PropTypes.number,
-
         // className for the panel
         className: React.PropTypes.string.isRequired,
 
@@ -353,7 +351,7 @@ module.exports = React.createClass({
                     }
 
                     if (!isMembershipChange(collapsedMxEv) ||
-                        this._wantsDateSeparator(this.props.events[i], collapsedMxEv.getDate())) {
+                        this._wantsDateSeparator(mxEv, collapsedMxEv.getDate())) {
                         break;
                     }
 
@@ -376,9 +374,7 @@ module.exports = React.createClass({
                     // of MemberEventListSummary, render each member event as if the previous
                     // one was itself. This way, the timestamp of the previous event === the
                     // timestamp of the current event, and no DateSeperator is inserted.
-                    const ret = this._getTilesForEvent(e, e, e === lastShownEvent);
-                    prevEvent = e;
-                    return ret;
+                    return this._getTilesForEvent(e, e, e === lastShownEvent);
                 }).reduce((a, b) => a.concat(b));
 
                 if (eventTiles.length === 0) {
@@ -397,6 +393,7 @@ module.exports = React.createClass({
                     ret.push(this._getReadMarkerTile(visible));
                 }
 
+                prevEvent = mxEv;
                 continue;
             }
 
@@ -649,12 +646,13 @@ module.exports = React.createClass({
         }
 
         const style = this.props.hidden ? { display: 'none' } : {};
-        style.opacity = this.props.opacity;
 
-        let className = this.props.className + " mx_fadable";
-        if (this.props.alwaysShowTimestamps) {
-            className += " mx_MessagePanel_alwaysShowTimestamps";
-        }
+        const className = classNames(
+            this.props.className,
+            {
+                "mx_MessagePanel_alwaysShowTimestamps": this.props.alwaysShowTimestamps,
+            },
+        );
 
         return (
             <ScrollPanel ref="scrollPanel" className={className}
diff --git a/src/components/structures/NotificationPanel.js b/src/components/structures/NotificationPanel.js
index 3c8f34fb86..3f1269f8a7 100644
--- a/src/components/structures/NotificationPanel.js
+++ b/src/components/structures/NotificationPanel.js
@@ -45,7 +45,6 @@ const NotificationPanel = React.createClass({
                     manageReadMarkers={false}
                     timelineSet={timelineSet}
                     showUrlPreview = {false}
-                    opacity={this.props.opacity}
                     tileShape="notif"
                     empty={_t('You have no visible notifications')}
                 />
diff --git a/src/components/structures/RoomView.js b/src/components/structures/RoomView.js
index 83ca987276..9b6dbb4c27 100644
--- a/src/components/structures/RoomView.js
+++ b/src/components/structures/RoomView.js
@@ -281,7 +281,7 @@ module.exports = React.createClass({
                     this.setState({
                         isPeeking: false,
                     });
-                    
+
                     // This won't necessarily be a MatrixError, but we duck-type
                     // here and say if it's got an 'errcode' key with the right value,
                     // it means we can't peek.
@@ -1697,7 +1697,7 @@ module.exports = React.createClass({
                     onResize={this.onChildResize}
                     uploadFile={this.uploadFile}
                     callState={this.state.callState}
-                    opacity={this.props.opacity}
+                    disabled={this.props.disabled}
                     showApps={this.state.showApps}
                 />;
         }
@@ -1758,7 +1758,6 @@ module.exports = React.createClass({
                     className="mx_RoomView_messagePanel mx_RoomView_searchResultsPanel"
                     onFillRequest={this.onSearchResultsFillRequest}
                     onResize={this.onSearchResultsResize}
-                    style={{ opacity: this.props.opacity }}
                 >
                     <li className={scrollheader_classes}></li>
                     { this.getSearchResultTiles() }
@@ -1789,7 +1788,6 @@ module.exports = React.createClass({
                 onScroll={this.onMessageListScroll}
                 onReadMarkerUpdated={this._updateTopUnreadMessagesBar}
                 showUrlPreview = {this.state.showUrlPreview}
-                opacity={this.props.opacity}
                 className="mx_RoomView_messagePanel"
             />);
 
@@ -1797,7 +1795,7 @@ module.exports = React.createClass({
         if (this.state.showTopUnreadMessagesBar) {
             const TopUnreadMessagesBar = sdk.getComponent('rooms.TopUnreadMessagesBar');
             topUnreadMessagesBar = (
-                <div className="mx_RoomView_topUnreadMessagesBar mx_fadable" style={{ opacity: this.props.opacity }}>
+                <div className="mx_RoomView_topUnreadMessagesBar">
                     <TopUnreadMessagesBar
                        onScrollUpClick={this.jumpToReadMarker}
                        onCloseClick={this.forgetReadMarker}
@@ -1805,10 +1803,19 @@ module.exports = React.createClass({
                 </div>
             );
         }
-        let statusBarAreaClass = "mx_RoomView_statusArea mx_fadable";
-        if (isStatusAreaExpanded) {
-            statusBarAreaClass += " mx_RoomView_statusArea_expanded";
-        }
+        const statusBarAreaClass = classNames(
+            "mx_RoomView_statusArea",
+            {
+                "mx_RoomView_statusArea_expanded": isStatusAreaExpanded,
+            },
+        );
+
+        const fadableSectionClasses = classNames(
+            "mx_RoomView_body", "mx_fadable",
+            {
+                "mx_fadable_faded": this.props.disabled,
+            },
+        );
 
         return (
             <div className={"mx_RoomView" + (inCall ? " mx_RoomView_inCall" : "")} ref="roomView">
@@ -1827,16 +1834,18 @@ module.exports = React.createClass({
                     onLeaveClick={(myMember && myMember.membership === "join") ? this.onLeaveClick : null}
                 />
                 { auxPanel }
-                { topUnreadMessagesBar }
-                { messagePanel }
-                { searchResultsPanel }
-                <div className={statusBarAreaClass} style={{opacity: this.props.opacity}}>
-                    <div className="mx_RoomView_statusAreaBox">
-                        <div className="mx_RoomView_statusAreaBox_line"></div>
-                        { statusBar }
+                <div className={fadableSectionClasses}>
+                    { topUnreadMessagesBar }
+                    { messagePanel }
+                    { searchResultsPanel }
+                    <div className={statusBarAreaClass}>
+                        <div className="mx_RoomView_statusAreaBox">
+                            <div className="mx_RoomView_statusAreaBox_line"></div>
+                            { statusBar }
+                        </div>
                     </div>
+                    { messageComposer }
                 </div>
-                { messageComposer }
             </div>
         );
     },
diff --git a/src/components/structures/TimelinePanel.js b/src/components/structures/TimelinePanel.js
index e3b3b66f97..2bf8a08b98 100644
--- a/src/components/structures/TimelinePanel.js
+++ b/src/components/structures/TimelinePanel.js
@@ -89,9 +89,6 @@ var TimelinePanel = React.createClass({
         // callback which is called when the read-up-to mark is updated.
         onReadMarkerUpdated: React.PropTypes.func,
 
-        // opacity for dynamic UI fading effects
-        opacity: React.PropTypes.number,
-
         // maximum number of events to show in a timeline
         timelineCap: React.PropTypes.number,
 
@@ -1157,7 +1154,6 @@ var TimelinePanel = React.createClass({
                           onScroll={this.onMessageListScroll}
                           onFillRequest={this.onMessageListFillRequest}
                           onUnfillRequest={this.onMessageListUnfillRequest}
-                          opacity={this.props.opacity}
                           isTwelveHour={this.state.isTwelveHour}
                           alwaysShowTimestamps={this.state.alwaysShowTimestamps}
                           className={this.props.className}
diff --git a/src/components/structures/UserSettings.js b/src/components/structures/UserSettings.js
index b69bea9282..7704cce0c7 100644
--- a/src/components/structures/UserSettings.js
+++ b/src/components/structures/UserSettings.js
@@ -271,9 +271,9 @@ module.exports = React.createClass({
         MatrixClientPeg.get().on("RoomMember.membership", this._onInviteStateChange);
 
         dis.dispatch({
-            action: 'ui_opacity',
-            sideOpacity: 0.3,
-            middleOpacity: 0.3,
+            action: 'panel_disable',
+            sideDisabled: true,
+            middleDisabled: true,
         });
         this._refreshFromServer();
 
@@ -311,9 +311,9 @@ module.exports = React.createClass({
     componentWillUnmount: function() {
         this._unmounted = true;
         dis.dispatch({
-            action: 'ui_opacity',
-            sideOpacity: 1.0,
-            middleOpacity: 1.0,
+            action: 'panel_disable',
+            sideDisabled: false,
+            middleDisabled: false,
         });
         dis.unregister(this.dispatcherRef);
         const cli = MatrixClientPeg.get();
diff --git a/src/components/views/dialogs/AddressPickerDialog.js b/src/components/views/dialogs/AddressPickerDialog.js
index 8c6f033bdc..5796e60cc9 100644
--- a/src/components/views/dialogs/AddressPickerDialog.js
+++ b/src/components/views/dialogs/AddressPickerDialog.js
@@ -272,20 +272,27 @@ module.exports = React.createClass({
             const topicEvent = room.currentState.getStateEvents('m.room.topic', '');
             const name = nameEvent ? nameEvent.getContent().name : '';
             const canonicalAlias = room.getCanonicalAlias();
+            const aliasEvents = room.currentState.getStateEvents('m.room.aliases');
+            const aliases = aliasEvents.map((ev) => ev.getContent().aliases).reduce((a, b) => {
+                return a.concat(b);
+            }, []);
             const topic = topicEvent ? topicEvent.getContent().topic : '';
 
             const nameMatch = (name || '').toLowerCase().includes(lowerCaseQuery);
-            const aliasMatch = (canonicalAlias || '').toLowerCase().includes(lowerCaseQuery);
+            const aliasMatch = aliases.some((alias) =>
+                (alias || '').toLowerCase().includes(lowerCaseQuery),
+            );
             const topicMatch = (topic || '').toLowerCase().includes(lowerCaseQuery);
             if (!(nameMatch || topicMatch || aliasMatch)) {
                 return;
             }
             const avatarEvent = room.currentState.getStateEvents('m.room.avatar', '');
             const avatarUrl = avatarEvent ? avatarEvent.getContent().url : undefined;
+
             results.push({
                 room_id: room.roomId,
                 avatar_url: avatarUrl,
-                name: name || canonicalAlias,
+                name: name || canonicalAlias || aliases[0] || _t('Unnamed Room'),
             });
         });
         this._processResults(results, query);
diff --git a/src/components/views/elements/AppTile.js b/src/components/views/elements/AppTile.js
index 3e343e098c..0070af1fb2 100644
--- a/src/components/views/elements/AppTile.js
+++ b/src/components/views/elements/AppTile.js
@@ -172,18 +172,29 @@ export default React.createClass({
     */
     _onDeleteClick: function() {
         if (this._canUserModify()) {
-            console.log("Delete widget %s", this.props.id);
-            this.setState({deleting: true});
-            MatrixClientPeg.get().sendStateEvent(
-                this.props.room.roomId,
-                'im.vector.modular.widgets',
-                {}, // empty content
-                this.props.id,
-            ).then(() => {
-                console.log('Deleted widget');
-            }, (e) => {
-                console.error('Failed to delete widget', e);
-                this.setState({deleting: false});
+            // Show delete confirmation dialog
+            const QuestionDialog = sdk.getComponent("dialogs.QuestionDialog");
+            Modal.createTrackedDialog('Delete Widget', '', QuestionDialog, {
+                title: _t("Delete Widget"),
+                description: _t(
+                    "Deleting a widget removes it for all users in this room." +
+                    " Are you sure you want to delete this widget?"),
+                button: _t("Delete widget"),
+                onFinished: (confirmed) => {
+                    if (!confirmed) {
+                        return;
+                    }
+                    this.setState({deleting: true});
+                    MatrixClientPeg.get().sendStateEvent(
+                        this.props.room.roomId,
+                        'im.vector.modular.widgets',
+                        {}, // empty content
+                        this.props.id,
+                    ).catch((e) => {
+                        console.error('Failed to delete widget', e);
+                        this.setState({deleting: false});
+                    });
+                },
             });
         } else {
             console.log("Revoke widget permissions - %s", this.props.id);
@@ -305,7 +316,7 @@ export default React.createClass({
         let deleteIcon = 'img/cancel.svg';
         let deleteClasses = 'mx_filterFlipColor mx_AppTileMenuBarWidget';
         if(this._canUserModify()) {
-            deleteIcon = 'img/cancel-red.svg';
+            deleteIcon = 'img/icon-delete-pink.svg';
             deleteClasses += ' mx_AppTileMenuBarWidgetDelete';
         }
 
diff --git a/src/components/views/elements/EditableItemList.js b/src/components/views/elements/EditableItemList.js
index 35e207daef..05ae625515 100644
--- a/src/components/views/elements/EditableItemList.js
+++ b/src/components/views/elements/EditableItemList.js
@@ -84,7 +84,9 @@ module.exports = React.createClass({
         onNewItemChanged: PropTypes.func,
         onItemAdded: PropTypes.func,
         onItemEdited: PropTypes.func,
-        onItemRemoved: PropTypes. func,
+        onItemRemoved: PropTypes.func,
+
+        canEdit: PropTypes.bool,
     },
 
     getDefaultProps: function() {
@@ -136,14 +138,16 @@ module.exports = React.createClass({
                 { label }
             </div>
             { editableItems }
-            <EditableItem
-                key={-1}
-                initialValue={this.props.newItem}
-                onAdd={this.onItemAdded}
-                onChange={this.onNewItemChanged}
-                addOnChange={true}
-                placeholder={this.props.placeholder}
-            />
+            { this.props.canEdit ?
+                <EditableItem
+                    key={-1}
+                    initialValue={this.props.newItem}
+                    onAdd={this.onItemAdded}
+                    onChange={this.onNewItemChanged}
+                    addOnChange={true}
+                    placeholder={this.props.placeholder}
+                /> : <div />
+            }
         </div>);
     },
 });
diff --git a/src/components/views/room_settings/AliasSettings.js b/src/components/views/room_settings/AliasSettings.js
index c64e876dbe..cb897c9daf 100644
--- a/src/components/views/room_settings/AliasSettings.js
+++ b/src/components/views/room_settings/AliasSettings.js
@@ -262,6 +262,7 @@ module.exports = React.createClass({
                     items={this.state.domainToAliases[localDomain] || []}
                     newItem={this.state.newAlias}
                     onNewItemChanged={this.onNewAliasChanged}
+                    canEdit={this.props.canSetAliases}
                     onItemAdded={this.onLocalAliasAdded}
                     onItemEdited={this.onLocalAliasChanged}
                     onItemRemoved={this.onLocalAliasDeleted}
diff --git a/src/components/views/room_settings/RelatedGroupSettings.js b/src/components/views/room_settings/RelatedGroupSettings.js
index 7227a951d7..0a2dc3341c 100644
--- a/src/components/views/room_settings/RelatedGroupSettings.js
+++ b/src/components/views/room_settings/RelatedGroupSettings.js
@@ -27,7 +27,7 @@ module.exports = React.createClass({
 
     propTypes: {
         roomId: React.PropTypes.string.isRequired,
-        canSetRelatedRooms: React.PropTypes.bool.isRequired,
+        canSetRelatedGroups: React.PropTypes.bool.isRequired,
         relatedGroupsEvent: React.PropTypes.instanceOf(MatrixEvent),
     },
 
@@ -37,7 +37,7 @@ module.exports = React.createClass({
 
     getDefaultProps: function() {
         return {
-            canSetRelatedRooms: false,
+            canSetRelatedGroups: false,
         };
     },
 
@@ -110,6 +110,7 @@ module.exports = React.createClass({
                 items={this.state.newGroupsList}
                 className={"mx_RelatedGroupSettings"}
                 newItem={this.state.newGroupId}
+                canEdit={this.props.canSetRelatedGroups}
                 onNewItemChanged={this.onNewGroupChanged}
                 onItemAdded={this.onGroupAdded}
                 onItemEdited={this.onGroupEdited}
diff --git a/src/components/views/rooms/ForwardMessage.js b/src/components/views/rooms/ForwardMessage.js
index 67e55101e8..b0fba12865 100644
--- a/src/components/views/rooms/ForwardMessage.js
+++ b/src/components/views/rooms/ForwardMessage.js
@@ -30,10 +30,9 @@ module.exports = React.createClass({
 
     componentWillMount: function() {
         dis.dispatch({
-            action: 'ui_opacity',
-            leftOpacity: 1.0,
-            rightOpacity: 0.3,
-            middleOpacity: 0.5,
+            action: 'panel_disable',
+            rightDisabled: true,
+            middleDisabled: true,
         });
     },
 
@@ -43,9 +42,9 @@ module.exports = React.createClass({
 
     componentWillUnmount: function() {
         dis.dispatch({
-            action: 'ui_opacity',
-            sideOpacity: 1.0,
-            middleOpacity: 1.0,
+            action: 'panel_disable',
+            sideDisabled: false,
+            middleDisabled: false,
         });
         document.removeEventListener('keydown', this._onKeyDown);
     },
diff --git a/src/components/views/rooms/MemberInfo.js b/src/components/views/rooms/MemberInfo.js
index 7d64b22cb0..0a98e8821b 100644
--- a/src/components/views/rooms/MemberInfo.js
+++ b/src/components/views/rooms/MemberInfo.js
@@ -93,7 +93,7 @@ module.exports = withMatrixClient(React.createClass({
     },
 
     componentWillReceiveProps: function(newProps) {
-        if (this.props.member.userId != newProps.member.userId) {
+        if (this.props.member.userId !== newProps.member.userId) {
             this._updateStateForNewMember(newProps.member);
         }
     },
@@ -125,12 +125,12 @@ module.exports = withMatrixClient(React.createClass({
     _disambiguateDevices: function(devices) {
         const names = Object.create(null);
         for (let i = 0; i < devices.length; i++) {
-            var name = devices[i].getDisplayName();
+            const name = devices[i].getDisplayName();
             const indexList = names[name] || [];
             indexList.push(i);
             names[name] = indexList;
         }
-        for (name in names) {
+        for (const name in names) {
             if (names[name].length > 1) {
                 names[name].forEach((j)=>{
                     devices[j].ambiguous = true;
@@ -144,7 +144,7 @@ module.exports = withMatrixClient(React.createClass({
             return;
         }
 
-        if (userId == this.props.member.userId) {
+        if (userId === this.props.member.userId) {
             // no need to re-download the whole thing; just update our copy of
             // the list.
 
@@ -194,7 +194,7 @@ module.exports = withMatrixClient(React.createClass({
     },
 
     onAccountData: function(ev) {
-        if (ev.getType() == 'm.direct') {
+        if (ev.getType() === 'm.direct') {
             this.forceUpdate();
         }
     },
@@ -249,7 +249,9 @@ module.exports = withMatrixClient(React.createClass({
             ignoredUsers.push(this.props.member.userId);
         }
 
-        this.props.matrixClient.setIgnoredUsers(ignoredUsers).then(() => this.setState({isIgnoring: !this.state.isIgnoring}));
+        this.props.matrixClient.setIgnoredUsers(ignoredUsers).then(() => {
+            return this.setState({isIgnoring: !this.state.isIgnoring});
+        });
     },
 
     onKick: function() {
@@ -259,7 +261,7 @@ module.exports = withMatrixClient(React.createClass({
         Modal.createTrackedDialog('Confirm User Action Dialog', 'onKick', ConfirmUserActionDialog, {
             member: this.props.member,
             action: kickLabel,
-            askReason: membership == "join",
+            askReason: membership === "join",
             danger: true,
             onFinished: (proceed, reason) => {
                 if (!proceed) return;
@@ -291,15 +293,15 @@ module.exports = withMatrixClient(React.createClass({
         const ConfirmUserActionDialog = sdk.getComponent("dialogs.ConfirmUserActionDialog");
         Modal.createTrackedDialog('Confirm User Action Dialog', 'onBanOrUnban', ConfirmUserActionDialog, {
             member: this.props.member,
-            action: this.props.member.membership == 'ban' ? _t("Unban") : _t("Ban"),
-            askReason: this.props.member.membership != 'ban',
-            danger: this.props.member.membership != 'ban',
+            action: this.props.member.membership === 'ban' ? _t("Unban") : _t("Ban"),
+            askReason: this.props.member.membership !== 'ban',
+            danger: this.props.member.membership !== 'ban',
             onFinished: (proceed, reason) => {
                 if (!proceed) return;
 
                 this.setState({ updating: this.state.updating + 1 });
                 let promise;
-                if (this.props.member.membership == 'ban') {
+                if (this.props.member.membership === 'ban') {
                     promise = this.props.matrixClient.unban(
                         this.props.member.roomId, this.props.member.userId,
                     );
@@ -334,15 +336,11 @@ module.exports = withMatrixClient(React.createClass({
         const roomId = this.props.member.roomId;
         const target = this.props.member.userId;
         const room = this.props.matrixClient.getRoom(roomId);
-        if (!room) {
-            return;
-        }
-        const powerLevelEvent = room.currentState.getStateEvents(
-            "m.room.power_levels", "",
-        );
-        if (!powerLevelEvent) {
-            return;
-        }
+        if (!room) return;
+
+        const powerLevelEvent = room.currentState.getStateEvents("m.room.power_levels", "");
+        if (!powerLevelEvent) return;
+
         const isMuted = this.state.muted;
         const powerLevels = powerLevelEvent.getContent();
         const levelToSend = (
@@ -357,7 +355,7 @@ module.exports = withMatrixClient(React.createClass({
         }
         level = parseInt(level);
 
-        if (level !== NaN) {
+        if (!isNaN(level)) {
             this.setState({ updating: this.state.updating + 1 });
             this.props.matrixClient.setPowerLevel(roomId, target, level, powerLevelEvent).then(
                 function() {
@@ -382,19 +380,14 @@ module.exports = withMatrixClient(React.createClass({
         const roomId = this.props.member.roomId;
         const target = this.props.member.userId;
         const room = this.props.matrixClient.getRoom(roomId);
-        if (!room) {
-            return;
-        }
-        const powerLevelEvent = room.currentState.getStateEvents(
-            "m.room.power_levels", "",
-        );
-        if (!powerLevelEvent) {
-            return;
-        }
+        if (!room) return;
+
+        const powerLevelEvent = room.currentState.getStateEvents("m.room.power_levels", "");
+        if (!powerLevelEvent) return;
+
         const me = room.getMember(this.props.matrixClient.credentials.userId);
-        if (!me) {
-            return;
-        }
+        if (!me) return;
+
         const defaultLevel = powerLevelEvent.getContent().users_default;
         let modLevel = me.powerLevel - 1;
         if (modLevel > 50 && defaultLevel < 50) modLevel = 50; // try to stick with the vector level defaults
@@ -407,7 +400,7 @@ module.exports = withMatrixClient(React.createClass({
                 // get out of sync if we force setState here!
                 console.log("Mod toggle success");
             }, function(err) {
-                if (err.errcode == 'M_GUEST_ACCESS_FORBIDDEN') {
+                if (err.errcode === 'M_GUEST_ACCESS_FORBIDDEN') {
                     dis.dispatch({action: 'view_set_mxid'});
                 } else {
                     console.error("Toggle moderator error:" + err);
@@ -443,7 +436,6 @@ module.exports = withMatrixClient(React.createClass({
     },
 
     onPowerChange: function(powerLevel) {
-        const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
         const roomId = this.props.member.roomId;
         const target = this.props.member.userId;
         const room = this.props.matrixClient.getRoom(roomId);
@@ -504,19 +496,14 @@ module.exports = withMatrixClient(React.createClass({
             modifyLevel: false,
         };
         const room = this.props.matrixClient.getRoom(member.roomId);
-        if (!room) {
-            return defaultPerms;
-        }
-        const powerLevels = room.currentState.getStateEvents(
-            "m.room.power_levels", "",
-        );
-        if (!powerLevels) {
-            return defaultPerms;
-        }
+        if (!room) return defaultPerms;
+
+        const powerLevels = room.currentState.getStateEvents("m.room.power_levels", "");
+        if (!powerLevels) return defaultPerms;
+
         const me = room.getMember(this.props.matrixClient.credentials.userId);
-        if (!me) {
-            return defaultPerms;
-        }
+        if (!me) return defaultPerms;
+
         const them = member;
         return {
             can: this._calculateCanPermissions(
@@ -552,14 +539,13 @@ module.exports = withMatrixClient(React.createClass({
         can.ban = me.powerLevel >= powerLevels.ban;
         can.mute = me.powerLevel >= editPowerLevel;
         can.toggleMod = me.powerLevel > them.powerLevel && them.powerLevel >= levelToSend;
-        can.modifyLevel = me.powerLevel > them.powerLevel;
+        can.modifyLevel = me.powerLevel > them.powerLevel && me.powerLevel >= editPowerLevel;
         return can;
     },
 
     _isMuted: function(member, powerLevelContent) {
-        if (!powerLevelContent || !member) {
-            return false;
-        }
+        if (!powerLevelContent || !member) return false;
+
         const levelToSend = (
             (powerLevelContent.events ? powerLevelContent.events["m.room.message"] : null) ||
             powerLevelContent.events_default
@@ -575,14 +561,15 @@ module.exports = withMatrixClient(React.createClass({
     },
 
     onMemberAvatarClick: function() {
-        const avatarUrl = this.props.member.user ? this.props.member.user.avatarUrl : this.props.member.events.member.getContent().avatar_url;
+        const member = this.props.member;
+        const avatarUrl = member.user ? member.user.avatarUrl : member.events.member.getContent().avatar_url;
         if(!avatarUrl) return;
 
         const httpUrl = this.props.matrixClient.mxcUrlToHttp(avatarUrl);
         const ImageView = sdk.getComponent("elements.ImageView");
         const params = {
             src: httpUrl,
-            name: this.props.member.name,
+            name: member.name,
         };
 
         Modal.createDialog(ImageView, params, "mx_Dialog_lightbox");
@@ -596,9 +583,7 @@ module.exports = withMatrixClient(React.createClass({
     },
 
     _renderDevices: function() {
-        if (!this._enableDevices) {
-            return null;
-        }
+        if (!this._enableDevices) return null;
 
         const devices = this.state.devices;
         const MemberDeviceInfo = sdk.getComponent('rooms.MemberDeviceInfo');
@@ -705,7 +690,13 @@ module.exports = withMatrixClient(React.createClass({
     },
 
     render: function() {
-        let startChat, kickButton, banButton, muteButton, giveModButton, spinner;
+        let startChat;
+        let kickButton;
+        let banButton;
+        let muteButton;
+        let giveModButton;
+        let spinner;
+
         if (this.props.member.userId !== this.props.matrixClient.credentials.userId) {
             const dmRoomMap = new DMRoomMap(this.props.matrixClient);
             const dmRooms = dmRoomMap.getDMRoomsForUserId(this.props.member.userId);
@@ -719,7 +710,7 @@ module.exports = withMatrixClient(React.createClass({
                     const me = room.getMember(this.props.matrixClient.credentials.userId);
                     const highlight = (
                         room.getUnreadNotificationCount('highlight') > 0 ||
-                        me.membership == "invite"
+                        me.membership === "invite"
                     );
                     tiles.push(
                         <RoomTile key={room.roomId} room={room}
@@ -727,7 +718,7 @@ module.exports = withMatrixClient(React.createClass({
                             selected={false}
                             unread={Unread.doesRoomHaveUnreadMessages(room)}
                             highlight={highlight}
-                            isInvite={me.membership == "invite"}
+                            isInvite={me.membership === "invite"}
                             onClick={this.onRoomTileClick}
                         />,
                     );
@@ -772,7 +763,7 @@ module.exports = withMatrixClient(React.createClass({
         }
         if (this.state.can.ban) {
             let label = _t("Ban");
-            if (this.props.member.membership == 'ban') {
+            if (this.props.member.membership === 'ban') {
                 label = _t("Unban");
             }
             banButton = (
@@ -815,11 +806,14 @@ module.exports = withMatrixClient(React.createClass({
 
         const memberName = this.props.member.name;
 
+        let presenceState;
+        let presenceLastActiveAgo;
+        let presenceCurrentlyActive;
+
         if (this.props.member.user) {
-            var presenceState = this.props.member.user.presence;
-            var presenceLastActiveAgo = this.props.member.user.lastActiveAgo;
-            const presenceLastTs = this.props.member.user.lastPresenceTs;
-            var presenceCurrentlyActive = this.props.member.user.currentlyActive;
+            presenceState = this.props.member.user.presence;
+            presenceLastActiveAgo = this.props.member.user.lastActiveAgo;
+            presenceCurrentlyActive = this.props.member.user.currentlyActive;
         }
 
         let roomMemberDetails = null;
diff --git a/src/components/views/rooms/MessageComposer.js b/src/components/views/rooms/MessageComposer.js
index 8e27520d89..93f20b8ec3 100644
--- a/src/components/views/rooms/MessageComposer.js
+++ b/src/components/views/rooms/MessageComposer.js
@@ -371,7 +371,7 @@ export default class MessageComposer extends React.Component {
         );
 
         return (
-            <div className="mx_MessageComposer mx_fadable" style={{ opacity: this.props.opacity }}>
+            <div className="mx_MessageComposer">
                 <div className="mx_MessageComposer_wrapper">
                     <div className="mx_MessageComposer_row">
                         { controls }
@@ -410,9 +410,6 @@ MessageComposer.propTypes = {
     // callback when a file to upload is chosen
     uploadFile: React.PropTypes.func.isRequired,
 
-    // opacity for dynamic UI fading effects
-    opacity: React.PropTypes.number,
-
     // string representing the current room app drawer state
     showApps: React.PropTypes.bool,
 };
diff --git a/src/components/views/rooms/RoomSettings.js b/src/components/views/rooms/RoomSettings.js
index 9934456597..dbdcdf596a 100644
--- a/src/components/views/rooms/RoomSettings.js
+++ b/src/components/views/rooms/RoomSettings.js
@@ -19,7 +19,6 @@ import Promise from 'bluebird';
 import React from 'react';
 import { _t, _tJsx, _td } from '../../../languageHandler';
 import MatrixClientPeg from '../../../MatrixClientPeg';
-import SdkConfig from '../../../SdkConfig';
 import sdk from '../../../index';
 import Modal from '../../../Modal';
 import ObjectUtils from '../../../ObjectUtils';
@@ -158,9 +157,9 @@ module.exports = React.createClass({
         });
 
         dis.dispatch({
-            action: 'ui_opacity',
-            sideOpacity: 0.3,
-            middleOpacity: 0.3,
+            action: 'panel_disable',
+            sideDisabled: true,
+            middleDisabled: true,
         });
     },
 
@@ -171,9 +170,9 @@ module.exports = React.createClass({
         }
 
         dis.dispatch({
-            action: 'ui_opacity',
-            sideOpacity: 1.0,
-            middleOpacity: 1.0,
+            action: 'panel_disable',
+            sideDisabled: false,
+            middleDisabled: false,
         });
     },
 
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index 9d91c3a110..7fa90db301 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -200,6 +200,8 @@
     "Authentication": "Authentication",
     "Failed to delete device": "Failed to delete device",
     "Delete": "Delete",
+    "Delete Widget": "Delete Widget",
+    "Deleting a widget removes it for all users in this room. Are you sure you want to delete this widget?": "Deleting a widget removes it for all users in this room. Are you sure you want to delete this widget?",
     "Disable Notifications": "Disable Notifications",
     "Enable Notifications": "Enable Notifications",
     "Cannot add any more widgets": "Cannot add any more widgets",