Add unread messages status in chat tabs

Add unread messages status in chat tabs
This idea/suggestion is Open. You can respond to ask questions or discuss the idea and either vote it up or down if you believe it should or should not be implemented, respectively. Popular suggestions and ideas will be considered by the development team to become reality in-game.
Proposal
Add an "unread messages" status to chat tabs.
Justification
No impact whatsoever, just a little QoL improvement.
Motivation
It's useful to split chat channels in multiple tabs, but more often than not the main one is cluttered to avoid missing messages elsewhere.
I think the thread title says it all. Obviously we don't need to know how many unread messages are there, just that there are some.