git-gui, feature request: add hotkeys to focus different widgets

To fully use git-gui with keyboard-only, a few more hotkeys are
needed. I am missing hotkeys to change focus between the "Unstanged
Changes", "Staged Changes", diff viewer and "Commit Message" widgets.
I would like to be able to stage, browse, unstage and commit in
git-gui, all without using the mouse.

I propose that CTRL+(number) could be used as hotkeys to change the
focus between the four widgets I've mentioned.


Best regards,
Birger Skogeng Pedersen