Nav menu item selection lists no longer need to be specifically de-whitespaced...

Nav menu item selection lists no longer need to be specifically de-whitespaced to match hierarchical taxonomy metaboxes. props corvannoorloos. See #22954 for trunk.


git-svn-id: https://core.svn.wordpress.org/trunk@23185 1a063a9b-81f0-0310-95a4-ce76da25c4cd