gr_fakecontrast and gr_spritebillboarding in the OpenGL settings menu

This MR resolves #406, allowing the console variables gr_fakecontrast and gr_spritebillboarding to be accessible from the OpenGL settings menu, just like in SRB2Kart. As far as I'm aware, there's no reason to keep it out of OGL settings in vanilla but if there's something the matter I can close this.

added 1 commit

• b03b994f - glfakecontrast's "on" is "standard" in Kart (as of v1.3) so now it's "standard" here

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added Enhancement Rendering OpenGL renderer labels

added 1 commit

• e8ab281b - Revert "glfakecontrast's "on" is "standard" in Kart (as of v1.3) so now it's "standard" here"

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Hm, merge conflicts. I think I'll close this and make a new MR when I inevitably reset my repo, since you can't git pull from the website :P

closed