Updates in-app and documentation references to automated messages
sent by the notification bot as automated notices (or automated
messages where more appropriate/clear), instead of notifications.
Also, makes some small related revisions / general clean ups to
`resolve-a-topic.md`.
Fixes#22188.
Adds a note about auto-notification messages that are sent when
these general settings are changed for a stream: name, description,
access and posting permissions, and message retention.
Uses new `select-stream-view-general.md` in instructions.
Also, moves admin warning to top of the article and updates
description text for clarity (instead of 'apps', specify
which apps have the description in the stream view).