diff -Naur wordpress/wp-includes/css/dist/edit-post/style.css wordpress/wp-includes/css/dist/edit-post/style.css
--- wordpress/wp-includes/css/dist/edit-post/style.css	2018-12-06 10:19:01.928710000 +0530
+++ wordpress/wp-includes/css/dist/edit-post/style.css	2018-12-07 16:46:46.220167958 +0530
@@ -427,7 +427,7 @@
 
 .edit-post-layout .editor-post-publish-panel {
   position: fixed;
-  z-index: 100001;
+  z-index: 10000;
   top: 46px;
   bottom: 0;
   right: 0;
diff -Naur wordpress/wp-includes/css/dist/edit-post/style-rtl.css wordpress/wp-includes/css/dist/edit-post/style-rtl.css
--- wordpress/wp-includes/css/dist/edit-post/style-rtl.css	2018-12-06 10:19:01.928710000 +0530
+++ wordpress/wp-includes/css/dist/edit-post/style-rtl.css	2018-12-07 16:46:40.436130876 +0530
@@ -427,7 +427,7 @@
 
 .edit-post-layout .editor-post-publish-panel {
   position: fixed;
-  z-index: 100001;
+  z-index: 10000;
   top: 46px;
   bottom: 0;
   left: 0;