Previously the smooth shading of the voxel remesher was controlled by a
mesh property. With this change, the output will try to match the
current shading of the object. This only takes into consideration the
shading mode of the first polygon of the model, but it is probably what
most users expect as it works as intended with the shade smooth/flat
object mode options.
Reviewed By: JulienKaspar, JacquesLucke
Differential Revision: https://developer.blender.org/D11626
ef7fcaf8e6