- ACTIVE flag is no longer in use.
- DESELECT was used in some places as an alias for false,
even though this could arguably help readability, in practice this
was often passed with a selection flag leading to confusing calls
such as `select_beztriple(bezt, DESELECT, SELECT, HIDDEN)`.
Replace SELECT/DESELECT with true/false in these cases.
- Remove ED_types.h. Add a 'SELECT' definition to DNA_anim_types.h,
for fcurve_test, we could use a shared DNA header, or remove use of
the define entirely in favor of typed enums.
17bc292530