Make the item-controls elements on the Edit Menus page line up; use :before instead of :after for item-edit icons for better cross-browser performance; switch to :after instead of ::after for pseudo-elements so IE8 displays these icons properly. Fixes #26059, props jeremyfelt.


Built from https://develop.svn.wordpress.org/trunk@26256


git-svn-id: http://core.svn.wordpress.org/trunk@26162 1a063a9b-81f0-0310-95a4-ce76da25c4cd