[j.0] PolyItem: simplify; disambiguate fcts ()

Base/Math/IntegratorMCMiser.h

Base/Type/CloneableVector.h

Base/Type/OwningVector.h

Base/Type/VectorWC.h

Base/Util/Vec.h

Fit/Adapter/MinimizerAdapter.h

Fit/Option/OptionContainer.h

GUI/Model/Beam/DistributionCatalog.h

GUI/Model/Beam/FootprintCatalog.h

GUI/Model/Beam/SourceItems.cpp

GUI/Model/Descriptor/PolyItem.h

GUI/Model/Detector/DetectorItem.cpp

GUI/Model/Detector/ResolutionFunctionCatalog.h

GUI/Model/FromCore/ItemizeSample.cpp

GUI/Model/Mask/MaskCatalog.h

GUI/Model/Sample/FormfactorCatalog.h

GUI/Model/Sample/InterferenceCatalog.h

GUI/Model/Sample/InterferenceItems.cpp

GUI/Model/Sample/ItemWithParticles.cpp

GUI/Model/Sample/Lattice2DCatalog.h