Separate classes for the different buttons

Also rename RoleButton to ActionButton because it's not being
given a Role any more.

src/components/views/elements/ActionButton.js

@@ -0,0 +1,80 @@
+/*
+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 PropTypes from 'prop-types';
+import AccessibleButton from './AccessibleButton';
+import dis from '../../../dispatcher';
+import sdk from '../../../index';
+
+export default React.createClass({
+    displayName: 'RoleButton',
+
+    propTypes: {
+        size: PropTypes.string,
+        tooltip: PropTypes.bool,
+        action: PropTypes.string.isRequired,
+        label: PropTypes.string.isRequired,
+        iconPath: PropTypes.string.isRequired,
+    },
+
+    getDefaultProps: function() {
+        return {
+            size: 25,
+            tooltip: false,
+        };
+    },
+
+    getInitialState: function() {
+        return {
+            showTooltip: false,
+        };
+    },
+
+    _onClick: function(ev) {
+        ev.stopPropagation();
+        dis.dispatch({action: this.props.action});
+    },
+
+    _onMouseEnter: function() {
+        if (this.props.tooltip) this.setState({showTooltip: true});
+    },
+
+    _onMouseLeave: function() {
+        this.setState({showTooltip: false});
+    },
+
+    render: function() {
+        const TintableSvg = sdk.getComponent("elements.TintableSvg");
+
+        let tooltip;
+        if (this.state.showTooltip) {
+            const RoomTooltip = sdk.getComponent("rooms.RoomTooltip");
+            tooltip = <RoomTooltip className="mx_RoleButton_tooltip" label={this.props.label} />;
+        }
+
+        return (
+            <AccessibleButton className="mx_RoleButton"
+                onClick={this._onClick}
+                onMouseEnter={this._onMouseEnter}
+                onMouseLeave={this._onMouseLeave}
+            >
+                <TintableSvg src={this.props.iconPath} width={this.props.size} height={this.props.size} />
+                {tooltip}
+            </AccessibleButton>
+        );
+    }
+});