message: focus on composer after jumping to bottom
diff: @@ -1254,6 +1254,7 @@ module.exports = React.createClass({
  // jump down to the bottom of this room, where new events are arriving
  jumpToLiveTimeline: function() {
  this.refs.messagePanel.jumpToLiveTimeline();
  + dis.dispatch({action: 'focus_composer'});
  },
  // jump up to wherever our read marker is
  