Ticket #41155: 41155.2.patch

themes.css

@@ -370 +370 @@
         bottom: 0;
         background: #f1f1f1;
         background: rgba( 238, 238, 238, 0.9 );
-        z-index: 10000; /* Over WP Pointers. */
+        z-index: 999; /* Over WP Pointers. */
 }
 
 .theme-overlay .theme-header {