title: User to user app request doesn't appear in notifications
body: <p>This is very weird. I know that if you create app to user created app-request, it doesn't appear anywhere..</p>
  
  <p>but in this case I tried the FB.ui dialog to create user to user app request. Like this:</p>
  
  <pre><code>FB.ui({method: 'apprequests',
      message: 'I invite you for a coffee together',
      to: xxxxxxxx
  });
  </code></pre>
  
  <p>It opens the dialog and sends the request successfully.</p>
  
  <p>but the problem is that the recipient doesnt get notified about the app request in any way..</p>
  
  <p>I tried disabling sandbox mode and everything, but there's no way to notify the recipient about the apprequest he has received :/</p>
  
  <p>What am i doing wrong?</p>