naming get/setChildValue -> get/setItemValue

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/DomainObjectBuilder.cpp

GUI/coregui/Models/FTDecayFunctionItems.cpp

GUI/coregui/Models/FTDistributionItems.cpp

GUI/coregui/Models/FitModel.cpp

GUI/coregui/Models/FitParameterModel.cpp

GUI/coregui/Models/FormFactorItems.cpp

GUI/coregui/Models/GUIObjectBuilder.cpp

GUI/coregui/Models/IntensityDataItem.cpp

GUI/coregui/Models/InterferenceFunctionItems.cpp

GUI/coregui/Models/ItemLink.cpp

GUI/coregui/Models/JobItem.cpp

GUI/coregui/Models/JobModel.cpp

GUI/coregui/Models/JobResultsPresenter.cpp

GUI/coregui/Models/MagneticFieldItem.cpp

GUI/coregui/Models/MaskItems.cpp