message: make RoomHeader Topic use EmojiText to be emojione-friendly
diff: @@ -255,7 +255,7 @@ module.exports = React.createClass({
  }
  }
  if (topic) {
  - topic_el = <div className="mx_RoomHeader_topic" ref="topic" title={ topic } dir="auto">{ topic }</div>;
  + topic_el = <EmojiText dir="auto" element="div" className="mx_RoomHeader_topic" ref="topic" title={topic}>{ topic }</EmojiText>;
  }
  }
  