message: Fix duplicate event registration.
diff: @@ -171,6 +171,7 @@ export default React.createClass({
  componentDidMount() {
  // Legacy Jitsi widget messaging -- TODO replace this with standard widget
  // postMessaging API
  + dis.register(this._onAction);
  window.addEventListener('message', this._onMessage, false);
  },
  @@ -346,8 +347,6 @@ export default React.createClass({
  console.log("Failed to get widget capabilities", this.widgetId, err);
  });
  this.setState({loading: false});
  -
  - dis.register(this._onAction);
  },
  _onAction(payload) {
  