[in6] disambiguate class InstrumentCollection vs file InstrumentItems ()

GUI/Model/Device/InstrumentCollection.cpp

GUI/Model/Device/InstrumentCollection.h

GUI/Model/Device/InstrumentItems.cpp

GUI/Model/Device/InstrumentItems.h

GUI/Model/Device/InstrumentLibrary.cpp

GUI/Model/Device/InstrumentLibrary.h

GUI/Model/Device/InstrumentsEditController.cpp

GUI/Model/Device/InstrumentsEditController.h

GUI/Model/FromDomain/GUIObjectBuilder.cpp

GUI/Model/FromDomain/GUIObjectBuilder.h

GUI/Model/FromDomain/GUISampleBuilder.cpp

GUI/Model/Model/ApplicationModels.h

GUI/Model/Project/LinkInstrumentManager.cpp

GUI/Model/Project/LinkInstrumentManager.h

GUI/Model/Project/ProjectDocument.cpp

GUI/Model/Project/ProjectDocument.h

GUI/View/Import/RealDataPropertiesWidget.cpp

GUI/View/Import/RealDataSelectorWidget.h

GUI/View/Import/SpecularDataImportWidget.cpp

GUI/View/Instrument/InstrumentLibraryEditor.cpp