Use a scalpel to dissect names passed to convert_to_screen(). Carefully watch...

Use a scalpel to dissect names passed to convert_to_screen(). Carefully watch for post type names, suffixes we need to detect and remove, and when we need to remove 'edit-' from the start of a hookname. see #19353.

git-svn-id: https://core.svn.wordpress.org/trunk@19468 1a063a9b-81f0-0310-95a4-ce76da25c4cd