Basically what slack does. So there won't be a minimised sidebar.

Benefits:

• more space when collapsed
• works for the connections sidebar as well without needing extra design
• simpler because collapsed versions of various sidebar elements aren't needed.
• this also means that the Toggle Sidebar menu item will always do something because there's always a relevant sidebar.

We'll probably need some design and this is intended as a follow-up at the end of the project (or for afterwards).