d3d: Get some initial GE previews working.

Wrong colors.
Support BGRA formats in the debugger previews.
d3d: Copy over the vertex preview stuff.

Really need to just centralize, I know.  But want a debugger that works
first.
d3d: Fix some RGBA / ARGB color issues.

I wonder if we should just send floats here?  We denormalize and then
renormalize in software...
Merge pull request #6781 from unknownbrackets/d3d9

d3d: Fix some RGBA / ARGB color issues.
Merge pull request #6780 from unknownbrackets/ge-debugger

Welcome Direct3D9 to the GE debugger family