message: don't lose focus after a / command
diff: @@ -745,9 +745,10 @@ export default class MessageComposerInput extends React.Component {
  });
  }
  if (cmd.promise) {
  - cmd.promise.then(function() {
  + cmd.promise.then(()=>{
  console.log("Command success.");
  - }, function(err) {
  + this.refs.editor.focus();
  + }, (err)=>{
  console.error("Command failure: %s", err);
  const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
  Modal.createTrackedDialog('Server error', '', ErrorDialog, {
  