Ticket #40315: 40315.patch

wp-admin/css/common.css

@@ -1161 +1161 @@
         display: block;
         overflow: hidden;
         width: 100%;
+        -webkit-box-sizing: border-box;
+    -moz-box-sizing: border-box;
+    box-sizing: border-box;
+        margin: 0;
 }
 
 .show-filters .filter-links a.current {