Change the edit menu item toggle to communicate more context about the item to be edited. Make edit text consistent between Customizer menu editor and admin menu editor.
The menu position is conveyed only visually, using indentation, because there are no organizational semantics in either editor. This change helps provide screen reader users with consistent contextual information about the order, position, and parent of the current item.
Props joedolson, rcreators, afercia, mohonchandra.
Fixes#60673, See #60672.
Built from https://develop.svn.wordpress.org/trunk@58306
git-svn-id: http://core.svn.wordpress.org/trunk@57763 1a063a9b-81f0-0310-95a4-ce76da25c4cd
