rem: void KMFilterActionAddHeader::applyParamWidgetValue( QWidget* paramWidget )
add: void KMFilterActionIdentity::applyParamWidgetValue( QWidget * paramWidget )
context: void KMFilterActionAddHeader::applyParamWidgetValue( QWidget* paramWidget ){  QComboBox *cb = (QComboBox*)paramWidget->child("combo");  Q_ASSERT( cb );  mParameter = cb->currentText();  QLineEdit *le = (QLineEdit*)paramWidget->child("ledit");  Q_ASSERT( le );  mValue = le->text();}