private void OnCipherAlgorithmOrderDown(object sender, EventArgs args)
{
int i = _cipherOrderList.SelectedIndex;
if (i == -1 || i == _cipherOrderList.Items.Count - 1) {
return;
}
object item = _cipherOrderList.SelectedItem;
_cipherOrderList.Items.RemoveAt(i);
_cipherOrderList.Items.Insert(i + 1, item);
_cipherOrderList.SelectedIndex = i + 1;
}