For full proposal see: T51382
- The workflow for UV-editing now uses the active face materials 'edit-image' instead of active 'texface'.
This uses BKE_object_material_edit_image_get/set for most of the API, so we can more easily change internal storage later if we want.
- Baking also uses edit-image instead of texface.
- Game engine uses edit-image too, this isn't correct, its more a place-holder alternative to showing nothing.
- Game engine image text no longer works *(could be supported but would need some changes to API to pass around an image/material)*.