Add an `$args` parameter to `comment_text` and `get_comment_text` filters. Adds filter docs. Improve docblocks for `get_comment_text()` and `comment_text()`.

Props simonwheatley, ericlewis, DrewAPicture.
Fixes #14856. 


Built from https://develop.svn.wordpress.org/trunk@25555


git-svn-id: http://core.svn.wordpress.org/trunk@25475 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Make the `WP_List_Table::months_dropdown()` query results filterable.

Introduces the `months_dropdown_results` filter.

Fixes #17022.

Built from https://develop.svn.wordpress.org/trunk@25556


git-svn-id: http://core.svn.wordpress.org/trunk@25476 1a063a9b-81f0-0310-95a4-ce76da25c4cd