Unstage a hunk in multifile diff

[fcFn]

I like how I can stage hunks when viewing multifile diff, but there doesn't seem to be a way to unstage hunks in the same way.

I would like to have similar buttons in/near the gutter. Using "Git: Unstage Changes" simply unstages the whole file and then it also seems to break the multifile diff until the window is reloaded (it doesn't show any changes, though this might be a 🐛).