Issue #3450181: Add Label Help support for Core Media reference fields

label_help.module

@@ -135,14 +135,16 @@ function label_help_form_alter(&$form, &$form_state, $form_id) {
         }
       }
 
-      // Special case for checkboxes and radios. Drupal's fieldset.html.twig do
-      // not support the #label_prefix, so use #field_prefix instead, but be
-      // careful to not overwrite content when the #field_prefix is already
-      // defined.
+      // Special case for media, checkboxes and radios where Drupal's
+      // fieldset.html.twig does not support the #label_prefix, so use
+      // #field_prefix instead, but be careful to not overwrite content
+      // when the #field_prefix is already defined.
       elseif (
         (
           !empty($item['widget']['#type']) &&
+          !empty($item['widget']['#title']) &&
           (
+            $item['widget']['#type'] == 'fieldset' ||
             $item['widget']['#type'] == 'checkboxes' ||
             $item['widget']['#type'] == 'radios'
           )