GUI: decouple directories View/Tool and View/Common

GUI/View/Common/DoubleSpinBox.cpp

GUI/View/Common/EditUtil.cpp

GUI/View/Common/EditUtil.h

GUI/View/Common/WidgetUtils.cpp

GUI/View/Common/WidgetUtils.h

GUI/View/Device/AxisPropertyForm.cpp

GUI/View/Device/BackgroundForm.cpp

GUI/View/Device/DetectorAlignmentForm.cpp

GUI/View/Device/FootprintForm.cpp

GUI/View/Device/ResolutionForm.cpp

GUI/View/Fit/MinimizerSettingsWidget.cpp

GUI/View/Instrument/DetectorEditor.cpp

GUI/View/Instrument/DistributionEditor.cpp

GUI/View/Instrument/OffspecDetectorEditor.cpp

GUI/View/Instrument/PolarizationAnalysisEditor.cpp

GUI/View/Mask/MaskEditorPropertyPanel.cpp

GUI/View/MaterialEditor/MaterialEditorDialog.cpp

GUI/View/Plot2D/IntensityDataPropertyWidget.cpp

GUI/View/PlotSpecular/SpecularDataPropertyWidget.cpp

GUI/View/SampleDesigner/InterferenceForm.cpp