message: if we're not granted, show an ErrorDialog with some text which needs changing
diff: @@ -20,6 +20,8 @@ import PlatformPeg from './PlatformPeg';
  import TextForEvent from './TextForEvent';
  import Avatar from './Avatar';
  import dis from './dispatcher';
  +import sdk from './index';
  +import Modal from './Modal';
  /*
  * Dispatches:
  @@ -131,6 +133,14 @@ const Notifier = {
  plaf.requestNotificationPermission().done((result) => {
  if (result !== 'granted') {
  // The permission request was dismissed or denied
  + const description = result === 'denied'
  + ? 'Your browser is not permitting this app to send you notifications.'
  + : 'It seems you didn\'t accept notifications when your browser asked';
  + const ErrorDialog = sdk.getComponent('dialogs.ErrorDialog');
  + Modal.createDialog(ErrorDialog, {
  + title: 'Unable to enable Notifications',
  + description,
  + });
  return;
  }
  