remove unnessary manual focussing of composer

now that composer is focused automatically when no other shortcuts
apply, remove the manual focusing we have in place where it's not needed

src/components/structures/RoomStatusBar.js

@@ -135,12 +135,10 @@ module.exports = React.createClass({
 
     _onResendAllClick: function() {
         Resend.resendUnsentEvents(this.props.room);
-        dis.dispatch({action: 'focus_composer'});
     },
 
     _onCancelAllClick: function() {
         Resend.cancelUnsentEvents(this.props.room);
-        dis.dispatch({action: 'focus_composer'});
     },
 
     _onShowDevicesClick: function() {