mv, merge some dirs

GUI/Model/Ax/AxesItems.h

GUI/Model/Base/VariantUtil.cpp

GUI/Model/D0/ApplicationModels.cpp

GUI/Model/D1/Data1DViewItem.cpp

GUI/Model/D1/Data1DViewItem.h

GUI/Model/D1/DataViewUtils.cpp

GUI/Model/D1/DataViewUtils.h

GUI/Model/D2/DataItem.h

GUI/Model/D4/DataProperties.h

GUI/Model/D4/DataPropertyContainer.h

GUI/Model/D8/ProjectionItems.h

GUI/Model/Fit/FitParameterContainerItem.h

GUI/Model/Fit/FitParameterHelper.cpp

GUI/Model/Fit/FitParameterItem.h

GUI/Model/Fit/FitParameterLinkItem.h

GUI/Model/Fit/FitParameterModel.cpp

GUI/Model/Fit/FitSuiteItem.h

GUI/Model/Fit/MinimizerItem.h

GUI/Model/Fit/ParameterTreeItems.h

GUI/Model/G0/DistributionItems.h