rem: void KMFilterActionIdentity::applyParamWidgetValue( QWidget * paramWidget )
add: void KMFilterActionAddHeader::applyParamWidgetValue( QWidget* paramWidget )
context: void KMFilterActionIdentity::applyParamWidgetValue( QWidget * paramWidget ){  KPIM::IdentityCombo * ic = dynamic_cast<KPIM::IdentityCombo*>( paramWidget );  assert( ic );  mParameter = ic->currentIdentity();}