rem: QLineEdit* edt; edt = aParent->createEdit(mTo); return edt;
add: QStringList ids = KMIdentity::identities(); QComboBox *cbx = aParent->createCombo( &ids, id );  return cbx;
context: QWidget* KMFilterActionForward::createParamWidget(KMGFilterDlg* aParent){  QLineEdit* edt;  edt = aParent->createEdit(mTo);  return edt;}