Reorg dirs: move widgets from GUI/Views/FitWidgets to GUI/Views/JobWidgets
The sourcecode
FitComparisonController.*FitComparisonViewController.*FitComparisonWidget.*FitComparisonWidget1D.*-
FitFlowWidget.*and HistogramPlot.*
has been moved from GUI/Views/FitWidgets/ to GUI/Views/JobWidgets/ because it is (mainly) used there and by doing so removes the dependency of JobWidgets on FitWidgets.