message: qt, refactor: Keep CoinControlDialog in the main event loop
diff: @@ -901,9 +901,9 @@ void SendCoinsDialog::coinControlFeatureChanged(bool checked)
  // Coin Control: button inputs -> show actual coin control dialog
  void SendCoinsDialog::coinControlButtonClicked()
  {
  - CoinControlDialog dlg(*m_coin_control, model, platformStyle);
  - dlg.exec();
  - coinControlUpdateLabels();
  + auto dlg = new CoinControlDialog(*m_coin_control, model, platformStyle);
  + connect(dlg, &QDialog::finished, this, &SendCoinsDialog::coinControlUpdateLabels);
  + GUIUtil::ShowModalDialogAndDeleteOnClose(dlg);
  }
  // Coin Control: checkbox custom change address
  