Ticket #20751: 20751-body-class.diff

wp-includes/post-template.php

@@ -502 +502 @@
 
         if ( is_admin_bar_showing() )
                 $classes[] = 'admin-bar';
+                $classes[] = 'no-customize-support';
 
         if ( get_theme_mod( 'background_color' ) || get_background_image() )
                 $classes[] = 'custom-background';