title: MessageBox with meaningful title
body: <p>When deleting documents in my application, I display a messagebox to confirm the deletion. However, the messagebox shows the correct message, but it also shows the server url instead of a meaningful messagebox title.</p>
  
  <p>How can I modify the messagebox title to show something like "Document deletion" instead of the servername ?</p>
  
  <p><img src="https://i.stack.imgur.com/4d4Fq.jpg" alt="screenshot"></p>