Add an option to disable clut/render-to-self/etc.

Some people with slower devices would prefer the higher render resolution with major graphical glitches, it seems like.  This isn't a very difficult option to add, and in some games the improper effects are probably tolerable.

-[Unknown]
Oops, that was a mistake.  I originally had it a positive setting but when I added the UI I flipped it.

-[Unknown]