message: qt, macos: Fix GUIUtil::PolishProgressDialog bug
  QProgressDialog shows itself if the estimated time an operation will
  take is beyond the minimumDuration value.
  Direct call show() breaks that behavior on macos.
diff: @@ -845,7 +845,6 @@ void PolishProgressDialog(QProgressDialog* dialog)
  // Workaround for macOS-only Qt bug; see: QTBUG-65750, QTBUG-70357.
  const int margin = TextWidth(dialog->fontMetrics(), ("X"));
  dialog->resize(dialog->width() + 2 * margin, dialog->height());
  - dialog->show();
  #else
  Q_UNUSED(dialog);
  #endif
  