Blender Git Loki

Fix missing ID tag when converting objects

Parenting to a curve path animation depends on both geometry and
transform components. Conversion of mesh to curve will make it so
parent have path animation, conversion of curve to mesh makes it
so there is no more path animation. Both cases affects children
of the converted objects, and it's not possible to rely on special
case for curve parent in the dependency graph as that link will be
lost after conversion of curve to mesh.

Simplest approach is to tag object for both geometry and transform
update, which will ensure all children are at valid state after
the conversion.