List widgets used on edit page
Would it be possible to include a list of the widgets used on a page (similar to how MW lists "Templates used on this page") at the bottom of the edit form? I tried looking through EditPage.php and here to see if there were any hooks in the right place to do this, but none of them seemed promising.
Having this list would make it easier for users to find the widget's documentation. (Example: User sees another user's page with spiffy stuff on it, thinks "How did they do that?" --> edit page to see code --> see widget list at bottom --> click link to widget page --> voilà!)
