Comment 2 for bug 1381592

I don't really understand why it's necessary to change the semantics when there doesn't appear to be a good reason to. If the aim of this change is to replace the fade model with a frame, then it seems just unnecessary to use setColorScale.

I checked in the other changes:
https://github.com/panda3d/panda3d/commit/e33cac03fe59a11d7578cd15c1a3599f4003db0f

Thank you! It feels good not to have unnecessary dependencies on loaded models.