Now that we have and use the last_moved_timestamp field in the
message object, we show the correct "edited" or "moved" indicator
for the message when we don't have access to the full message
edit history in the web app.
Documents organization setting that configures what message edit
history can be viewed: content edits and topic/channel moves, only
topic/channel moves, or disabling viewing edit history completely.
Renames article to match new help article header and creates URL
redirect for previous article header.
Also, clean up and consolidate related articles.
Fixes#33684.
Co-authored-by: Alya Abbott <alya@zulip.com>
