Merge branch 'refactor_model' into 'develop'

GUI/Models/AxesItems.cpp

GUI/Models/AxesItems.h

GUI/Models/BeamItems.cpp

GUI/Models/ComponentProxyStrategy.cpp

GUI/Models/Data1DViewItem.cpp

GUI/Models/GUIObjectBuilder.cpp

GUI/Models/GroupInfoCatalog.cpp

GUI/Models/InstrumentItems.cpp

GUI/Models/IntensityDataItem.cpp

GUI/Models/ItemCatalog.cpp

GUI/Models/PointwiseAxisItem.cpp

GUI/Models/RectangularDetectorItem.cpp

GUI/Models/SpecularBeamInclinationItem.cpp

GUI/Models/SpecularDataItem.cpp

GUI/Models/SphericalDetectorItem.cpp

GUI/Models/TransformFromDomain.cpp

GUI/Models/TransformFromDomain.h

GUI/Views/FitWidgets/FitComparisonController.cpp

GUI/Views/InstrumentWidgets/DetectorMaskDelegate.cpp

GUI/Views/IntensityDataWidgets/ColorMap.cpp