Clarify wording of “delete removed posts after” setting

Continuing the discussion from Split “delete all posts and topics allowed groups” into own-content and global-content permissions:

The wording of delete_removed_posts_after is also slightly ambiguous.

It currently says:

I think this could be clearer if it distinguished the initial author-facing removal from the later cleanup/deletion stage.

For example, something like:

It would also be helpful if the description clarified whether staff/admins can still see the deleted/hidden post during that window, whether ordinary users see any placeholder, and how revision history is treated. - though i appreciate that may increase the word count excessively.