Feature Request: Minimal Sidebar

[Snazzyham]

Just installed Wey and it feels pretty fast, I'm liking how minimal it is. One issue I have is that the sidebar is pretty large. It would be nice if we could get rid of the team switcher sidebar for users who are only part of one slack team, and maybe make the sidebar a little smaller so the window takes up less space.

All in all great app so far, thanks!