Ticket #55078: 55078.diff

src/js/_enqueues/lib/ajax-response.js

@@ -27 +27 @@
                                 var th = jQuery(this), child = jQuery(this.firstChild), response;
                                 response = { action: th.attr('action'), what: child.get(0).nodeName, id: child.attr('id'), oldId: child.attr('old_id'), position: child.attr('position') };
                                 response.data = jQuery( 'response_data', child ).text();
-                                if ( jQuery( 'body' ).hasClass( 'edit-tags-php' ) ) {
+                                if ( jQuery( 'supplemental', child ).children()['data_is_success_message'] ) {
                                         successmsg += response.data;
                                 }
                                 response.supplemental = {};

src/wp-admin/includes/ajax-actions.php

@@ -1111 +1111 @@
                 $message = $messages['_item'][1];
         }
 
+        $data_is_success_message = true;
+
         $x->add(
                 array(
                         'what'         => 'taxonomy',
                         'data'         => $message,
-                        'supplemental' => compact( 'parents', 'noparents' ),
+                        'supplemental' => compact( 'parents', 'noparents', 'data_is_success_message' ),
                 )
         );