Sort out the defines in the OpenVolumemesh plugins
The types define ENABLE_POLYHEDRALMESH_SUPPORT
while the plugins curreently seem to use -DENABLE_OPENVOLUMEMESH_SUPPORT -DENABLE_OPENVOLUMEMESH_POLYHEDRAL_SUPPORT
The types define ENABLE_POLYHEDRALMESH_SUPPORT
while the plugins curreently seem to use -DENABLE_OPENVOLUMEMESH_SUPPORT -DENABLE_OPENVOLUMEMESH_POLYHEDRAL_SUPPORT