Communication: Change color of chat-Icon if there are unread messages

[Feras797]

Is your feature request related to a problem?

In order to check in which channel I have unread messages, I have to open each channel and look manually.

Describe the solution you'd like

When I get a new message in a channel, e.g. direct messages, the Icon should change the color to "Artemis blue", such that I am immediately aware at a first glance.

Describe alternatives you've considered

The asterisk character * or red dot next to the channel Icon to indicate unread message(s).

Additional context

Currently the number in the round brackets only indicates the number of sub-channels: