Issue #3341952 by tim-diels: Use substr to search for menu_link_content_

simple_terms_and_menus.module

@@ -26,7 +26,7 @@ function simple_terms_and_menus_module_implements_alter(&$implementations, $hook
 function simple_terms_and_menus_form_alter(&$form, FormStateInterface $form_state, $form_id) {
 
   // Clean up menu form.
-  if ($form_id == 'menu_link_content_menu_link_content_form') {
+  if (substr($form_id, 0, 18) == 'menu_link_content_') {
     $hasPermission = \Drupal::currentUser()
       ->hasPermission('use advanced menu options');