i love the treebar.. i think that a great addition you could do is a right click and close all or close group on each of the groups. for example lets say i'm on 10 channels. i could right click on the treebar entry that says Channel: 10 and click close group to close every one of those windows. This could prove useful if you ever find yourself in a situation where you've been spammed by bots or something. it could also be useful if you have come back from being afk a few hours and a lot of people have messaged you etc etc.

This has been suggested before, It would be handy, also the abity to make your own popups for the treebar would be nice.

Yes. Shift+Click should also work on the folder items.