Ticket #19376: 19376.patch

wp-admin/css/wp-admin-rtl.dev.css

@@ -634 +634 @@
         left: 20px;
 }
 
+.welcome-panel .welcome-panel-close:before {
+        left: auto;
+        right: -12px;
+}
+
 .welcome-panel .wp-badge {
         float: right;
 }