make it work

src/components/structures/RoomView.js

@@ -1398,7 +1398,11 @@ module.exports = React.createClass({
                 // We have a regular invite for this room.
                 return (
                     <div className="mx_RoomView">
-                        <RoomHeader ref="header" room={this.state.room}/>
+                        <RoomHeader
+                            ref="header"
+                            room={this.state.room}
+                            collapsedRhs={ this.props.collapsedRhs }
+                        />
                         <div className="mx_RoomView_auxPanel">
                             <RoomPreviewBar onJoinClick={ this.onJoinButtonClicked }
                                             onRejectClick={ this.onRejectButtonClicked }
@@ -1607,6 +1611,7 @@ module.exports = React.createClass({
                     oobData={this.props.oobData}
                     editing={this.state.editingRoomSettings}
                     saving={this.state.uploadingRoomSettings}
+                    collapsedRhs={ this.props.collapsedRhs }
                     onSearchClick={this.onSearchClick}
                     onSettingsClick={this.onSettingsClick}
                     onSaveClick={this.onSettingsSaveClick}

src/components/views/rooms/RoomHeader.js

@@ -115,8 +115,8 @@ module.exports = React.createClass({
         }).done();
     },
 
-    onCollapseRhsClick: function(ev) {
-        dis.dispatch({ action: 'hide_right_panel' });
+    onShowRhsClick: function(ev) {
+        dis.dispatch({ action: 'show_right_panel' });
     },
 
     /**
@@ -294,7 +294,7 @@ module.exports = React.createClass({
         var rightPanel_buttons;
         if (this.props.collapsedRhs) {
             rightPanel_buttons =
-                <div className="mx_RoomHeader_button" onClick={this.onCollapseRhsClick} title=">">
+                <div className="mx_RoomHeader_button" onClick={this.onShowRhsClick} title=">">
                     <TintableSvg src="img/minimise.svg" width="10" height="16"/>
                 </div>
         }

src/components/views/rooms/SimpleRoomHeader.js

@@ -17,6 +17,8 @@ limitations under the License.
 'use strict';
 
 var React = require('react');
+var sdk = require('../../../index');
+var dis = require("../../../dispatcher");
 
 /*
  * A stripped-down room header used for things like the user settings
@@ -28,19 +30,39 @@ module.exports = React.createClass({
     propTypes: {
         title: React.PropTypes.string,
         onCancelClick: React.PropTypes.func,
+
+        // is the RightPanel collapsed?
+        collapsedRhs: React.PropTypes.bool,
+    },
+
+    onShowRhsClick: function(ev) {
+        dis.dispatch({ action: 'show_right_panel' });
     },
 
     render: function() {
+        var TintableSvg = sdk.getComponent("elements.TintableSvg");
+
         var cancelButton;
         if (this.props.onCancelClick) {
             cancelButton = <div className="mx_RoomHeader_cancelButton" onClick={this.props.onCancelClick}><img src="img/cancel.svg" width="18" height="18" alt="Cancel"/> </div>
         }
 
+        var showRhsButton;
+        /* // don't bother cluttering things up with this for now.
+        if (this.props.collapsedRhs) {
+            showRhsButton =
+                <div className="mx_RoomHeader_button" style={{ float: 'right' }} onClick={this.onShowRhsClick} title=">">
+                    <TintableSvg src="img/minimise.svg" width="10" height="16"/>
+                </div>
+        }
+        */
+
         return (
             <div className="mx_RoomHeader" >
                 <div className="mx_RoomHeader_wrapper">
                     <div className="mx_RoomHeader_simpleHeader">
                         { this.props.title }
+                        { showRhsButton }
                         { cancelButton }
                     </div>
                 </div>