OK, I'll look into it, but I guess I could use some help. :-)
The thing is, everything is laid out for GUIs now, shortcuts require listening to other events. While adding these shouldn't be too hard as such, getting the interaction with the GUI events right could be a bit harder, so it could take me a while to get this implemented.
There's something where you could contribute perhaps, though: I think I must have an icon for the shortcuts -- something which makes sense even on the little room provided in the shortcuts menu, but also as a toggle button for the GUI. Using text works around the problem of not having a suitable icon, but as you've already noticed, it may waste a lot of screen real estate (depending on the locale).
If you can help me out with some nice, original graphics, you can contact me here or on the forum.