reverted attribute system - leave it for now

GUI/coregui/Models/AxesItems.cpp

GUI/coregui/Models/BeamAngleItems.cpp

GUI/coregui/Models/BeamDistributionItem.cpp

GUI/coregui/Models/BeamItem.cpp

GUI/coregui/Models/BeamWavelengthItem.cpp

GUI/coregui/Models/DistributionItem.cpp

GUI/coregui/Models/FTDistributionItems.cpp

GUI/coregui/Models/FitModel.cpp

GUI/coregui/Models/FitParameterModel.cpp

GUI/coregui/Models/FormFactorItems.cpp

GUI/coregui/Models/GroupItem.cpp

GUI/coregui/Models/GroupItem.h

GUI/coregui/Models/GroupProperty.cpp

GUI/coregui/Models/GroupProperty.h

GUI/coregui/Models/InstrumentItem.cpp

GUI/coregui/Models/IntensityDataItem.cpp

GUI/coregui/Models/InterferenceFunctionItems.cpp

GUI/coregui/Models/ItemFactory.cpp

GUI/coregui/Models/JobItem.cpp

GUI/coregui/Models/LayerItem.cpp