More keyboard shortcuts in the desktop app / browser would be awesome!

[eliduke]

I have found some keyboard shortcuts for bold and italics and such inside the rich text editor, haven't found any others yet.

Would be great to have some shortcuts for toggling through chat rooms and DMs, cmd-F to go to the search bar, esc for the app back arrow button, etc. Anyone found any other shortcuts while playing around?

Thoughts? Concerns? I'd be happy to whip up a PR if that's helpful.

Thanks!