Revert "capture [this] -> [&]"

GUI/Model/Model/FitParameterModel.cpp

GUI/Model/Sample/MaterialModel.cpp

GUI/View/Access/DataAccessWidget.cpp

GUI/View/Canvas/MaskEditorActions.cpp

GUI/View/Canvas/MaskToolbox.cpp

GUI/View/Combo/ItemComboWidget.cpp

GUI/View/Data/DatafilesSelector.cpp

GUI/View/Fit/FitSessionWidget.cpp

GUI/View/FitControl/GUIFitObserver.cpp

GUI/View/FitControl/MinimizerSettingsWidget.cpp

GUI/View/Frame/Fit2DFrame.cpp

GUI/View/Frame/Plot2DWithProjectionFrame.cpp

GUI/View/Info/CautionSign.cpp

GUI/View/Instrument/InstrumentLibraryDialog.cpp

GUI/View/Main/AboutDialog.cpp

GUI/View/Numeric/DoubleSpinBox.cpp

GUI/View/ParEdit/CustomEditors.cpp

GUI/View/Plotter/ColorMap.cpp

GUI/View/Plotter/ProjectionsPlot.cpp

GUI/View/Project/SimulationView.cpp