Inline documentation for hooks in wp-admin/includes/class-wp-media-list-table.php.

Props theorboman for the initial patch. Props kpdesign.
Fixes #25839.


git-svn-id: https://develop.svn.wordpress.org/trunk@26916 602fd350-edb4-49c9-b593-d223f7449a82
Inline documentation for hooks in wp-admin/media-upload.php.

Props piontkowski for the initial patch.
Fixes #26075.


git-svn-id: https://develop.svn.wordpress.org/trunk@26917 602fd350-edb4-49c9-b593-d223f7449a82