private void combo_TextUpdate(object sender, EventArgs e) {
update_autorecognize_radio();
update_negate();
if (combo.Text != "" && dropped_first_time_) {
string old = combo.Text;
dropped_first_time_ = false;
combo.DroppedDown = false;
// typing something could be default select something - we don't want that
combo.Text = old;
combo.SelectionStart = old.Length;
}
}