Windows: Typing a file name to Widget-based QFileDialog search field without a suffix results an warning.

Using tests\manual\dialogs:

• Uncheck Use Native Dialogs (Use widget based file dialog)
• Choose getOpenFileName, showModal or similar
• Set a filter to a QFileDialog, for example *.txt.
• Note that files not matching are grayed out (as opposed to Linux, where they don't show)
• Start typing name of grayed-out file, select the file from completion
  The warning:

  File not found.
  Check the file name and try again.
  

  #include <QApplication>
  #include <QFileDialog>
  #include <QDir>
  #include <QDebug>
  
  int main(int argc, char *argv[])
  {
      QApplication app(argc, argv);
  
      QFileDialog *dialog = new QFileDialog();
      dialog->setDirectory(QDir::currentPath());
      qDebug()<<dialog->getOpenFileName(0, "Open File", QDir::currentPath(), "*.txt");
      return app.exec();
  }