private void buttonFilterCountries_Click(object sender, EventArgs e)
{
// country codes are hard-coded, no need to update them
allowedCountriesWindow.ShowDialog();
}
private void buttonFilterExpansions_Click(object sender, EventArgs e)
{
// maybe some expansions were added due to update of database
allowedExpansionsWindow.UpdateDataSource(MKMDbManager.Instance.GetAllExpansionNames(true));
allowedExpansionsWindow.ShowDialog();
}