Add confirmation dialog to kick/ban buttons

Add a specific dialog used for confirming member actions.

Also remove onFinished from MemberInfo which did absolutely
nothing.

src/components/views/dialogs/ConfirmUserActionDialog.js

@@ -0,0 +1,83 @@
+/*
+Copyright 2017 Vector Creations Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from 'react';
+import sdk from '../../../index';
+import classnames from 'classnames';
+
+/*
+ * A dialog for confirming an operation on another user.
+ * Takes a user ID and a verb, displays the target user prominently
+ * such that it should be easy to confirm that tne operation is being
+ * performed on the right person, and displays the operation prominently
+ * to make it obvious what is going to happen.
+ * Also tweaks the style for 'dangerous' actions (albeit only with colour)
+ */
+export default React.createClass({
+    displayName: 'ConfirmUserActionDialog',
+    propTypes: {
+        member: React.PropTypes.object.isRequired, // member object
+        action: React.PropTypes.string.isRequired, // eg. 'Ban'
+        danger: React.PropTypes.bool,
+        onFinished: React.PropTypes.func.isRequired,
+    },
+
+    defaultProps: {
+        danger: false,
+    },
+
+    onOk: function() {
+        this.props.onFinished(true);
+    },
+
+    onCancel: function() {
+        this.props.onFinished(false);
+    },
+
+    render: function() {
+        const BaseDialog = sdk.getComponent('views.dialogs.BaseDialog');
+        const MemberAvatar = sdk.getComponent("views.avatars.MemberAvatar");
+
+        const title = this.props.action + " this person?";
+        const confirmButtonClass = classnames({
+            'mx_Dialog_primary': true,
+            'danger': this.props.danger,
+        });
+        return (
+            <BaseDialog className="mx_UserActionConfirmDialog" onFinished={this.props.onFinished}
+                onEnterPressed={ this.onOk }
+                title={title}
+            >
+                <div className="mx_Dialog_content">
+                    <div className="mx_ConfirmUserActionDialog_avatar">
+                        <MemberAvatar member={this.props.member} width={72} height={72} />
+                    </div>
+                    <div className="mx_ConfirmUserActionDialog_name">{this.props.member.name}</div>
+                    <div className="mx_ConfirmUserActionDialog_userId">{this.props.member.userId}</div>
+                </div>
+                <div className="mx_Dialog_buttons">
+                    <button className={confirmButtonClass} onClick={this.onOk} autoFocus={true}>
+                        {this.props.action}
+                    </button>
+
+                    <button onClick={this.onCancel}>
+                        Cancel
+                    </button>
+                </div>
+            </BaseDialog>
+        );
+    },
+});