message: remove window onFocus handling entirely
diff: @@ -247,7 +247,6 @@ module.exports = React.createClass({
  UDEHandler.startListening();
  this.focusComposer = false;
  - window.addEventListener("focus", this.onFocus);
  // this can technically be done anywhere but doing this here keeps all
  // the routing url path logic together.
  @@ -910,12 +909,6 @@ module.exports = React.createClass({
  });
  },
  - onFocus: function(ev) {
  - if (document.activeElement.textLength === undefined) {
  - dis.dispatch({action: 'focus_composer'});
  - }
  - },
  -
  showScreen: function(screen, params) {
  if (screen == 'register') {
  dis.dispatch({
  