Closing “chat” tabs

I was enjoying a few friendly games of Barbarian Assault earlier today when my interface glitched a little and I was only left with my General chat window and Private Messages window as far as chat tabs go.
To me, this is beautiful, I don’t have to see the Friend Chat and Clan Chat (oh and emotes) tabs being there and taking up space.
Could we get the ability to close these tabs without needing to use mishaps like this?

I’ve saved my glitched interface as a Custom Preset already btw