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

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

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Inline documentation for hooks in wp-admin/media-upload.php.

Props piontkowski for the initial patch.
Fixes #26075.

Built from https://develop.svn.wordpress.org/trunk@26917


git-svn-id: http://core.svn.wordpress.org/trunk@26798 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Inline documentation for hooks in wp-admin/includes/meta-boxes.php.

Props SpencerFinnell for the initial patch.
Fixes #26092.

Built from https://develop.svn.wordpress.org/trunk@26918


git-svn-id: http://core.svn.wordpress.org/trunk@26799 1a063a9b-81f0-0310-95a4-ce76da25c4cd