"Back" button for Channels

Please give us the ability to go back on a channel -- for instance maybe I'm in the room in "Lobby" but go to the other channel in the room called "Lab" and I want to go back to the last room I was in because I was just checking something, I then need to find it on the list of rooms on the left and then click it -- I understand it's not entirely that hard but this could save a lot of time with a simple back button feature, it doesn't need to include much history, maybe 1 back button or maybe 5.

I think this would help the UI/UX a whole lot for the end user on PC at least.

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