Transparency? I hardly knew 'er!

Change the order of operations when applying transparency and colormap such that colormap isn't applied to the screen pixel twice (and, in the case of R_DrawTranslatedTranslucentColumn_8, the source pixel as well). The issue manifests itself as transparent, non-fullbright objects being unusually dark.

Please note I haven't touched the ASM equivalents, given as they're not actually used.

This doesn't mark a return to vanilla development; rather, this is something I discovered while I was bugfixing for Kart, and figured vanilla had right of first refusal on.

This merge request is set to go into master because it is purely visual.