Highlight rooms with new messages when logging in

[ffaf1]

To reproduce

1. Set up profanity, an XMPP account, join various rooms, PM with friends.
2. Log off (with /quit), wait a couple of hours.
3. Log in.
4. If you got new messages from friends, you see a message indicator near their nicks.
5. If there are new messages in rooms, you do not get any kind of indication.

Expected behaviour

You get some kind of indication there are new messages (and the specific room these messages are in).
This way the user does not have to cycle through rooms to see if he is up to date with each conversation.

(If this is actually possible, have it clearly marked on the manual or have it on by default.)

System

Debian trixie, Profanity, version 0.15.0.

[jubalh]

PRs welcome, I don't plan to work on this.

[prktypes]

working on fixing this, will open a PR shortly.