rm last 'Widgets' from GUI/View subdirectory names

GUI/View/Fit/FitWorker.h

GUI/View/Fit/FitWorkerLauncher.cpp

GUI/View/Fit/FitWorkerLauncher.h

GUI/View/Fit/GUIFitObserver.cpp

GUI/View/Fit/GUIFitObserver.h

GUI/View/Fit/JobMessagePanel.cpp

GUI/View/Fit/JobMessagePanel.h

GUI/View/Fit/JobRealTimeToolBar.cpp

GUI/View/Fit/JobRealTimeToolBar.h

GUI/View/Fit/JobRealTimeWidget.cpp

GUI/View/Fit/JobRealTimeWidget.h

GUI/View/Fit/MinimizerSettingsWidget.cpp

GUI/View/Fit/MinimizerSettingsWidget.h

GUI/View/Fit/ParameterTuningDelegate.cpp

GUI/View/Fit/ParameterTuningDelegate.h

GUI/View/Fit/ParameterTuningWidget.cpp

GUI/View/Fit/ParameterTuningWidget.h

GUI/View/Fit/RunFitControlWidget.cpp

GUI/View/Fit/RunFitControlWidget.h

GUI/View/Fit/SliderSettingsWidget.cpp