title: Wicket - container not repainted / feedback message not shown in combination with a download (AjaxLink)
body: <p>I'm using an AjaxLink and in it's onClick() method i'm doing the following stuff:</p>
  
  <ol>
  <li>start download (getRequestCycle().scheduleRequestHandlerAfterCurrent( new RedirectRequestHandler("http://" + url "));)</li>
  <li>display feedback message (download started...)</li>
  <li>update ListView (add text to it)</li>
  <li>add the container (div) which contains the feedbackpanel and the ListView to the target: (target.add(...);)</li>
  </ol>
  
  <p>So, the only thing what happens at first is the download dialog is shown and i can save it to my disk. But no feedback message is shown and the content stays the same (should be updated).</p>
  
  <p>But if i press F5, the page gets reloaded and the feedback messages are shown and the content is updated. But i want to show it directly.</p>
  
  <p>On the other side: if i remove the download call (getRequestCycle().scheduleRequestHandlerAfterCurrent( new RedirectRequestHandler("http://" + url "));) from the onClick mehtod, it works.
  So, the download is not triggered BUT the feedback messages are shown and the content is updated.</p>
  
  <p>So, how can i handle that? The redirect / download causes the problem it seems.</p>
  
  <p>I'm using wicket 6.</p>
  
  <p><strong>Edit:</strong>
  The url is calculated with RandomStringUtils for example... 
  getRequestCycle().scheduleRequestHandlerAfterCurrent(new RedirectRequestHandler("http://" + url + "/test/" + randomString + "/download"));
  So i need java / wicket to do the stuff.</p>