rename AbstractData -> IData

GUI/Model/Device/RealItem.cpp

GUI/Model/Device/RealItem.h

GUI/Model/Model/RealTreeModel.cpp

GUI/Support/IO/AbstractDataLoader.cpp

GUI/Support/IO/AbstractDataLoader.h

GUI/Support/IO/AbstractDataLoaderResultModel.cpp

GUI/Support/IO/AbstractDataLoaderResultModel.h

GUI/Support/IO/DataLoaders1D.cpp

GUI/Support/IO/DataLoaders1D.h

GUI/View/Import/ImportDataUtil.cpp

GUI/View/Import/ImportDataUtil.h

GUI/View/Import/RealDataSelectorWidget.cpp

GUI/View/Import/SpecularDataImportWidget.cpp

GUI/View/Import/SpecularDataImportWidget.h

GUI/View/Loaders/AutomaticDataLoader1D.cpp

GUI/View/Loaders/AutomaticDataLoader1D.h

GUI/View/Loaders/AutomaticDataLoader1DResultModel.h

GUI/View/Loaders/QREDataLoader.cpp

GUI/View/Loaders/QREDataLoader.h

GUI/View/Loaders/QREDataLoaderProperties.cpp