22316: EDF 2719 SMESH: Split hexas into prisms
22316: EDF 2719 SMESH: Split hexas into prisms

 disable dialog if a mesh includes no hexahedra

FedoraScientific/salome-smesh,FedoraScientific/salome-smesh,FedoraScientific/salome-smesh,FedoraScientific/salome-smesh