Unclosed Request Review Script - Add ability to filter chat to just *-pls & related messages

[Tyler-H]

(this is an enhancement request)

In accordance with SO-Close-Vote-Reviewers/room-meeting-topics#25 and the concern of at least one user who wants to see all unrelated chat hidden, I'm posting this enhancement request to allow a feature to toggle (or some other activation mechanism, of course) all "off-topic chat" off... in other words, for the visible chat messages in the room, toggling on would apply display: none; to all <div class="user-container monologue"> (or <div class="message"> divs, if necessary) divs that contain messages that either:

• don't contain the markup of one of the *-pls requests
  OR
• are not part of a chained conversation that begin with a *-pls request

If that is too much work, a simpler option would be to go with just the first criterion above.

This would actually be useful to anyone who wanted to see a quick, temporary view of all the requests in the chat, without having to navigate to another page.