I'm going to bump and revive this old thread since the feature freeze is now over. I actually now realize that this could go in Rockbox general so if it needs to be moved, by all means be my guest.
If I had any coding experience or knowledge I'd have a go at a patch or something, but unfortunately I don't. In my humble opinion, it SEEMS like something that's relatively easy enough to implement, but what do I know? In all honesty, not much lol
Anyways, hopefully this option could be implemented