Review Request #12716 — Created Nov. 8, 2022 and submitted
The way the dashboard currently does batch operations is to iterate
through the entire list of checked items and do an API call for each
one. This works OK but is quite inefficient, and our new batch view
allows doing it all in a single HTTP request.
This change moves the visibility operations (archive, mute, and
unarchive/unmute) over to that new endpoint.