[serialization_6] GUI: serialization refactoring part 6 ()

GUI/Model/Descriptor/SelectionProperty.h

GUI/Model/Sample/CompoundItem.cpp

GUI/Model/Sample/CompoundItem.h

GUI/Model/Sample/CoreAndShellItem.cpp

GUI/Model/Sample/CoreAndShellItem.h

GUI/Model/Sample/InterferenceItems.cpp

GUI/Model/Sample/InterferenceItems.h

GUI/Model/Sample/ItemWithMaterial.cpp

GUI/Model/Sample/ItemWithMaterial.h

GUI/Model/Sample/ItemWithParticles.cpp

GUI/Model/Sample/ItemWithParticles.h

GUI/Model/Sample/LayerItem.cpp

GUI/Model/Sample/MesocrystalItem.cpp

GUI/Model/Sample/MesocrystalItem.h

GUI/Model/Sample/ParticleItem.cpp

GUI/Model/Sample/ParticleItem.h

GUI/Model/Sample/ParticleLayoutItem.cpp

GUI/Model/Sample/ParticleLayoutItem.h

GUI/Model/Sample/SampleItem.cpp

GUI/View/SampleDesigner/CoreAndShellForm.cpp