Ticket #38684: 38684.2.diff

src/wp-admin/css/common.css

@@ -3178 +3178 @@
         font-size: 13px;
         width: 97%;
         background: #f9f9f9;
-        outline: none;
+        -moz-tab-size: 4;
+        -o-tab-size: 4;
+        tab-size: 4;
 }
 
 /* rtl:ignore */