Ticket #33559: 33559.4.patch

src/wp-admin/css/common.css

@@ -2018 +2018 @@
 }
 
 h1.nav-tab-wrapper, /* Back-compat for pre-4.4 */
-h2.nav-tab-wrapper,
+.wrap h2.nav-tab-wrapper, /* higher specificity to override .wrap > h2:first-child */
 h3.nav-tab-wrapper {
         border-bottom: 1px solid #ccc;
         margin: 0;