Add scroll to status bar keybind hint groups

[wade-cheng]

As it turns out, the main artboard provides a lot of keybinds, but the user is not able to view them all.

Screenshot of all keybinds, stretched across two monitors:

Screenshot of truncation when one monitor:

For reference, the control bar (thing with node graph button, canvas zoom, etc) is a similar height and is scrollable.

[Keavon]

I have some design ideas for this which I will be aiming to prototype at some point.