thread RoomTile focus events through RoomSubList up to RoomList

src/components/structures/RoomSubList.js

@@ -78,6 +78,7 @@ var RoomSubList = React.createClass({
         showSpinner: React.PropTypes.bool, // true to show a spinner if 0 elements when expanded
         collapsed: React.PropTypes.bool.isRequired, // is LeftPanel collapsed?
         onHeaderClick: React.PropTypes.func,
+        onRoomTileFocus: React.PropTypes.func,
         alwaysShowHeader: React.PropTypes.bool,
         incomingCall: React.PropTypes.object,
         onShowMoreRooms: React.PropTypes.func,
@@ -373,6 +374,7 @@ var RoomSubList = React.createClass({
                     refreshSubList={ self._updateSubListCount }
                     incomingCall={ null }
                     onClick={ self.onRoomTileClick }
+                    onFocus={ self.props.onRoomTileFocus }
                 />
             );
         });