Plugins and Themes Auto-Updates:

- Fix displaying of errors on the Themes screen.
- Correct the classes used for the error messages, and use `notice-alt` as notices are mostly shown on a white background.

Props afercia, azaozz.
Fixes #50405.

git-svn-id: https://develop.svn.wordpress.org/trunk@48092 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/class-wp-plugins-list-table.php

@@ -1096,7 +1096,7 @@ class WP_Plugins_List_Table extends WP_List_Table {
 					 */
 					echo apply_filters( 'plugin_auto_update_setting_html', $html, $plugin_file, $plugin_data );
 
-					echo '<div class="inline notice error hidden"><p></p></div>';
+					echo '<div class="notice notice-error notice-alt inline hidden"><p></p></div>';
 					echo '</td>';
 
 					break;