Saving plot to the file is restored.

GUI/coregui/Models/NIntensityDataItem.cpp

.../Views/Components/JobQueueWidgets/JobOutputDataWidget.cpp

...ui/Views/Components/JobQueueWidgets/JobOutputDataWidget.h

...coregui/Views/Components/OutputDataWidgets/ColorMapPlot.h

...iews/Components/OutputDataWidgets/HorizontalSlicePlot.cpp

.../Components/OutputDataWidgets/IntensityDataPlotWidget.cpp

...ws/Components/OutputDataWidgets/IntensityDataPlotWidget.h

...iews/Components/OutputDataWidgets/IntensityDataWidget.cpp

.../Views/Components/OutputDataWidgets/IntensityDataWidget.h