Localize the notifications dropdown string

Localized the notifications dropdown string

app/assets/javascripts/notifications_dropdown.js

 import $ from 'jquery';
 import Flash from './flash';
+import { __ } from '~/locale';
 
 export default function notificationsDropdown() {
   $(document).on('click', '.update-notification', function updateNotificationCallback(e) {
@@ -27,7 +28,7 @@ export default function notificationsDropdown() {
         .closest('.js-notification-dropdown')
         .replaceWith(data.html);
     } else {
-      Flash('Failed to save new settings', 'alert');
+      Flash(__('Failed to save new settings'), 'alert');
     }
   });
 }

changelogs/unreleased/localize-notification-dropdown.yml

+---
+title: Localize notifications dropdown
+merge_request: 26844
+author:
+type: changed

locale/gitlab.pot

@@ -3595,6 +3595,9 @@ msgstr ""
 msgid "Failed to remove user key."
 msgstr ""
 
+msgid "Failed to save new settings"
+msgstr ""
+
 msgid "Failed to update issues, please try again."
 msgstr ""