@Override
  public boolean hideAllPopups() {
    final JComboBox[] candidates = { myModuleComboBox, myScopeCombo.getComboBox(), myDirectoryChooser.getComboBox() };
    for (JComboBox candidate : candidates) {
      if (candidate.isPopupVisible()) {
        candidate.hidePopup();
        return true;
      }
    }
    return false;
  }
@Override
  public boolean hideAllPopups()