[UPDATE] cleanup some colorkey 1.2->2.0, in an attempt to resolve weird color issues. Still have more work to do to understand how to replace the missing SDL_DisplayFormat, how lack of alpha affected was handled and the best solution and otherwise how to fix the current green-hued screen
[FIX] update pixel format to be SDL_PIXELFORMAT_ABGR8888, as that resolves the busted green color issues we were seeing