Remove message slide-down effect on the nav-menus.php page. props lessbloat, fixes #23714.



git-svn-id: https://core.svn.wordpress.org/trunk@23640 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add back "Add New" next to h2 on Nav Menus screen.

props DrewAPicture. see #23641

git-svn-id: https://core.svn.wordpress.org/trunk@23641 1a063a9b-81f0-0310-95a4-ce76da25c4cd