Merge branch 'SelectionDescriptor' into 'develop'

GUI/Models/DomainObjectBuilder.cpp

GUI/Models/InterferenceItems.cpp

GUI/Models/InterferenceItems.h

GUI/Models/ItemWithParticles.cpp

GUI/Models/ItemWithParticles.h

GUI/Models/LayerItem.cpp

GUI/Models/LayerItem.h

GUI/Models/MesoCrystalItem.cpp

GUI/Models/MesoCrystalItem.h

GUI/Models/MultiLayerItem.cpp

GUI/Models/SelectionDescriptor.h

GUI/Models/TransformToDomain.cpp

GUI/Models/TransformToDomain.h

GUI/Models/TransformationItem.cpp

GUI/Models/TransformationItem.h

Tests/Unit/GUI/TestLayerRoughnessItems.cpp

Tests/Unit/GUI/TestMultiLayerItem.cpp