Add this workaround for the MacOS saturation "bug"(fix) to ColorSaturation #19

I'm using the ColorSaturation mod to make the game use a 1.2x boosted saturation to look like the colors MacOS used due to a bug in OpenGL before Vulkan incidentally fixed it, but it isn't perfect since the old colors were due to a mismatched colorspace rather than a simple saturation boost.

But I just saw this comment that apparently makes it look like the old OpenGL coloring even on Vulkan. Adding a checkbox in ColorSaturation that does that would in theory make it identical to old versions for MacOS players (as opposed to a close but not exact approximation from a saturation boost), and maybe could even be expanded on to choose other colorspaces if any more have subjectively beneficial changes to other people