IsRadioMode
bool IsRadioMode() const;
if (IsRadioMode()) {
err = data->AddBool("_radio", IsRadioMode());
if (!menu->IsRadioMode() || (item = menu->FindMarked()) == NULL) {
if (menu->IsRadioMode() && menu->IsLabelFromMarked() && item != NULL)
if (fSuper->IsRadioMode())