Use pencil icon for room bar toogle.

static/partials/roombar.html

@@ -1,5 +1,5 @@
 <div class="roombar overlaybar form-horizontal" ng-class="{notvisible: !layout.roombar}">
-	<a class="overlaybar-button" ng-model="layout.roombar" btn-checkbox btn-checkbox-true="true" btn-checkbox-false="false" title="{{_('Change room')}}"><i class="fa fa-th-list"></i></a>
+	<a class="overlaybar-button" ng-model="layout.roombar" btn-checkbox btn-checkbox-true="true" btn-checkbox-false="false" title="{{_('Change room')}}"><i class="fa fa-pencil-square-o"></i></a>
 	<form name="roombarform" class="overlaybar-content form-group">
 		<label class="pull-left control-label hidden-xs">{{_('Room')}}</label>
 		<div class="pull-left">