REFAC: continue upgrade to qt5 signal/slot syntax

Modules/Wrappers/QtWidget/src/otbQtStringSelectionWidget.cxx

...dget/src/otbWrapperQtWidgetComplexInputImageParameter.cxx

...rs/QtWidget/src/otbWrapperQtWidgetInputImageParameter.cxx

...Widget/src/otbWrapperQtWidgetInputVectorDataParameter.cxx

...rappers/QtWidget/src/otbWrapperQtWidgetListEditWidget.cxx

...pers/QtWidget/src/otbWrapperQtWidgetListViewParameter.cxx

...idget/src/otbWrapperQtWidgetOutputVectorDataParameter.cxx

...rappers/QtWidget/src/otbWrapperQtWidgetParameterGroup.cxx

...Wrappers/QtWidget/src/otbWrapperQtWidgetParameterList.cxx

...appers/QtWidget/src/otbWrapperQtWidgetStringParameter.cxx