VectorDataWidget : Fix remaining Qt5 compatibility issues
VectorDataWidget : Fix remaining Qt5 compatibility issues

appleseedhq/gaffer,hradec/gaffer,appleseedhq/gaffer,boberfly/gaffer,johnhaddon/gaffer,lucienfostier/gaffer,ivanimanishi/gaffer,ivanimanishi/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,andrewkaufman/gaffer,hradec/gaffer,boberfly/gaffer,appleseedhq/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,lucienfostier/gaffer,GafferHQ/gaffer,ivanimanishi/gaffer,ImageEngine/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer,lucienfostier/gaffer,lucienfostier/gaffer,ImageEngine/gaffer,ImageEngine/gaffer,ivanimanishi/gaffer,appleseedhq/gaffer,hradec/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,hradec/gaffer,andrewkaufman/gaffer,hradec/gaffer,boberfly/gaffer,johnhaddon/gaffer,boberfly/gaffer