Ticket #25603: 25603.15.diff

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

@@ -5961 +5961 @@
         display: block !important;
         font-size: 150%;
         font-weight: normal !important;
-        box-sizing: border-box;
+        -webkit-box-sizing: border-box;
+        -moz-box-sizing:    border-box;
+        box-sizing:         border-box;
         width: 100%;
         padding: 17px 0;
         margin-bottom: 15px;