[j.gui1] GUI cleanup while reading towards detector editor ()

GUI/Model/Data/DataItem.cpp

GUI/Model/Data/DataItem.h

GUI/Support/Style/GroupBoxCollapser.cpp

GUI/Support/Style/GroupBoxCollapser.h

GUI/View/Device/DetectorForm.cpp

GUI/View/Device/DetectorForm.h

GUI/View/Device/FootprintForm.cpp

GUI/View/Device/FootprintForm.h

GUI/View/Instrument/DetectorEditor.cpp

GUI/View/Instrument/DetectorEditor.h

GUI/View/PlotScale/FontScalingEvent.cpp

GUI/View/PlotSpecular/SpecularPlot.cpp

GUI/View/PlotUtil/ColorMap.cpp

GUI/View/Projection/ProjectionsPlot.cpp

GUI/View/SampleDesigner/CompoundForm.cpp

GUI/View/SampleDesigner/CoreAndShellForm.cpp

GUI/View/SampleDesigner/LayerForm.cpp

GUI/View/SampleDesigner/MesocrystalForm.cpp

GUI/View/SampleDesigner/ParticleForm.cpp

GUI/View/SampleDesigner/ParticleLayoutForm.cpp