rem: mView->setModified( true ); mView->history()->recordDelete( incidence );  return true;
add: mView->changeIncidenceDisplay( incidence, KOGlobals::INCIDENCEDELETED ); return true;
context:     bool visitGeneral( Incidence *incidence ) {        mView->setModified( true );        mView->history()->recordDelete( incidence );//        mView->changeIncidenceDisplay( incidence, KOGlobals::INCIDENCEDELETED );        return true;    }