Hey hey!
We’ve rolled out 0.51.1 with an update to Sidebar behavior – the button to show/hide the Vault (your list of Chats & Spaces) is now always visible.
Also, you can now hide sections in the Widget bar 
P.S. the sections-management option came together pretty quickly as a fast solution, so it may feel a bit rough in places. We’ll follow up with a smoother version asap!