Combine these selectors which both target the 'Menu Structure' heading on Edit Menus. Use .menu-edit instead of #post-body to ensure this margin applies only to the Edit Menus page. Fixes #26228.
Built from https://develop.svn.wordpress.org/trunk@26383


git-svn-id: http://core.svn.wordpress.org/trunk@26283 1a063a9b-81f0-0310-95a4-ce76da25c4cd