make it work

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>
         }