Feature Request: Closing all tags in sidebar shortcut

I’ve been a happy Bear user for years, but now I’m digging in to see all the features/hotkeys I’ve been missing. Because of wrist issues, I try to use keyboard shortcuts wherever possible: In the sidebar you open and close nested tags using the left and right arrows. Since I have many tags with long lists of subtags, it would be extremely useful to be able to use something like cmd-(left arrow) to close all nested tags. This would make browsing up and down the list of tags much easier.

Thanks for creating such a fantastic app!