Descriptors & Properties: mv using std::variant & std::function to cpp

GUI/Model/Descriptor/AxisProperty.cpp

GUI/Model/Descriptor/AxisProperty.h

GUI/Model/Descriptor/DistributionItems.cpp

GUI/Model/Descriptor/DistributionItems.h

GUI/Model/Descriptor/DoubleDescriptor.cpp

GUI/Model/Descriptor/DoubleDescriptor.h

GUI/Model/Descriptor/DoubleProperty.cpp

GUI/Model/Descriptor/DoubleProperty.h

GUI/Model/Descriptor/VectorDescriptor.h

GUI/Model/Descriptor/VectorProperty.cpp

GUI/Model/Descriptor/VectorProperty.h

GUI/Model/Model/ParameterTreeUtils.cpp

GUI/View/Mask/MaskEditorPropertyPanel.cpp

GUI/View/Mask/MaskEditorPropertyPanel.h

GUI/View/SampleDesigner/FormLayouter.cpp

GUI/View/SampleDesigner/FormLayouter.h

GUI/View/SampleDesigner/LayerEditorUtils.cpp

GUI/View/SampleDesigner/LayerEditorUtils.h

GUI/View/SampleDesigner/SelectionContainerForm.h

GUI/View/Tool/WidgetUtils.cpp