FormFactorInfo -> WeightedFormFactor, and update @file entries and include guards.

Core/Aggregate/WeightedFormFactor.cpp

Core/Aggregate/WeightedFormFactor.h

Core/Computation/ThreadedComputation.h

Core/Multilayer/DecouplingApproximationStrategy.cpp

Core/Multilayer/DecouplingApproximationStrategy.h

Core/Multilayer/IInterferenceFunctionStrategy.cpp

Core/Multilayer/IInterferenceFunctionStrategy.h

Core/Multilayer/LayerStrategyBuilder.cpp

Core/Multilayer/LayerStrategyBuilder.h

...ultilayer/SizeSpacingCorrelationApproximationStrategy.cpp

.../Multilayer/SizeSpacingCorrelationApproximationStrategy.h

GUI/coregui/Models/LinkInstrumentItem.h

GUI/coregui/Views/ImportDataWidgets/LinkInstrumentManager.h

GUI/coregui/Views/ImportDataWidgets/RealDataMaskWidget.h

...egui/Views/ImportDataWidgets/RealDataPropertiesWidget.cpp

...oregui/Views/ImportDataWidgets/RealDataPropertiesWidget.h

GUI/coregui/Views/MaskWidgets/MaskUnitsConverter.h

GUI/coregui/Views/MaskWidgets/RegionOfInterestView.cpp

GUI/coregui/Views/MaskWidgets/RegionOfInterestView.h

GUI/externals/qt-manhattan-style/progressbar.h