Allow two Dual Pistols Swap Ammo toggles on, for half-and-half effects

[Kai Moon]

While generating this AI image of a DP blaster, I thought to myself, allowing only one Swap Ammo toggle on at a time was a missed opportunity.

Obviously, this would be major work for minor game mechanics impact. The min-max wouldn't change: one toggle not two = same as current, presumably. This would be almost entirely for cosmetic flair, to amp up the flavor of having two guns. But I can dream.