title: How to add QLineEdit to QMessageBox PyQt5
body: <p>I want a copyable text on my QMessageBox so I thought I can put a QLineEdit on QMessageBox then set the text of QLineEdit whatever I want, so user can choose the text and copy it.</p>
  
  <p>But I couldn't success. Is there a way to add QLineEdit to QMessageBox or make a copyable text on QMessageBox?</p>