decouple ItemFileNameUtils from items

GUI/Models/Data/IntensityDataItem.cpp

GUI/Models/Data/MaskUnitsConverter.cpp

GUI/Models/Data/RealDataItem.cpp

GUI/Models/Fit/FitParameterHelper.cpp

GUI/Models/Fit/FitParameterItems.cpp

GUI/Models/Instrument/InstrumentItems.cpp

GUI/Models/Job/JobItem.cpp

GUI/Models/Job/JobModel.cpp

GUI/Models/Job/JobModelFunctions.cpp

GUI/Models/Job/ParameterTreeUtils.cpp

GUI/Models/Session/SessionItem.cpp

GUI/Models/Varia/ItemCatalog.cpp

GUI/Views/FitWidgets/FitParameterWidget.cpp

GUI/Views/FitWidgets/ParameterTuningWidget.cpp

GUI/Views/MaskWidgets/MaskContainerView.cpp

GUI/Views/MaskWidgets/MaskGraphicsScene.cpp

GUI/Views/MaskWidgets/MaskViewFactory.cpp

GUI/Views/ProjectionsWidgets/ProjectionsPlot.cpp

GUI/Views/ProjectionsWidgets/SaveProjectionsAssistant.cpp

GUI/utils/ItemFileNameUtils.cpp