rename GUI/Support/XML/Backup.h -> GUI/Model/Util/

GUI/Model/Detector/DetectorItem.cpp

GUI/Model/Device/InstrumentItems.cpp

GUI/Model/File/DatafileItem.cpp

GUI/Model/Job/JobItem.cpp

GUI/Model/Mask/MaskItems.cpp

GUI/Model/Mask/PointItem.cpp

GUI/Model/Sample/SampleItem.cpp

GUI/Model/Sample/SamplesSet.cpp

GUI/Model/Util/Backup.h

GUI/View/Device/DistributionSelector.cpp

GUI/View/Sample/MaterialInplaceForm.cpp

GUI/View/Sample/SampleEditorController.cpp

Tests/Unit/GUI/TestMaterialItems.cpp