Ticket #25867: 25867.2.diff

src/wp-admin/css/wp-admin.css

@@ -4901 +4901 @@
         border-style: solid;
 }
 
+.wp-customizer .ac_results {
+        z-index: 500001;
+}
+
 .ac_results li {
         padding: 2px 5px;
         white-space: nowrap;

src/wp-admin/customize.php

@@ -56 +56 @@
 wp_user_settings();
 _wp_admin_html_begin();
 
-$body_class = 'wp-core-ui js';
+$body_class = 'wp-core-ui wp-customizer js';
 
 if ( wp_is_mobile() ) :
         $body_class .= ' mobile';