Instantiate UsersSelect in the dispatcher for projects:edit

Signed-off-by: Rémy Coutable <remy@rymai.me>

app/assets/javascripts/dispatcher.js

@@ -263,6 +263,7 @@ const ShortcutsBlob = require('./shortcuts_blob');
           shortcut_handler = new ShortcutsNavigation();
           break;
         case 'projects:edit':
+          new UsersSelect();
           const el = document.querySelector('.js-service-desk-setting-root');
           if (el) {
             const serviceDeskRoot = new ServiceDeskRoot(el);

app/views/projects/ee/_merge_request_settings.html.haml

@@ -113,5 +113,4 @@
         .descr Approvals are reset when new data is pushed to the merge request
 
 :javascript
-  new UsersSelect();
   new GroupsSelect();