`On Unfocus` should be stateful rather than configured

[rsomani95]

Hi, thank you for making this plugin :)

I don't think it makes sense for the app to have the exact same behavior when one exits focus mode. If I had the left and right sidebars collapsed before turning on focus mode, I'd like for it to remain collapsed when I exit focus mode too. Similarly, if they weren't collapsed, I'd want to return to the same state as before when I exit focus mode.

[sethfair]

I am planning on the next version to have more control over what changes. I hope this will address your concerns. Stay tuned.