Inline documentation for hooks in wp-admin/edit-tag-form.php.

Props nicolealleyinteractivecom, kpdesign.
Fixes #25448.

Built from https://develop.svn.wordpress.org/trunk@26895


git-svn-id: http://core.svn.wordpress.org/trunk@26778 1a063a9b-81f0-0310-95a4-ce76da25c4cd
DFW: fix buttons and the title width, make the fade out/in when opening and closing a bit faster. See #24067.
Built from https://develop.svn.wordpress.org/trunk@26896


git-svn-id: http://core.svn.wordpress.org/trunk@26779 1a063a9b-81f0-0310-95a4-ce76da25c4cd