title: GWT OnScroll event does not fire
body: <p>I have a small app that wraps a <code>TextArea</code> inside a <code>ScrollPanel</code>.</p>
  
  <p>When I instantiate the <code>ScrollPanel</code> and attach a <code>ScrollEventHandler</code> WITHIN <code>OnModuleLoad()</code> - the <code>OnScroll</code> event fires properly.</p>
  
  <p>However, when I create a separate <code>Composite</code> class for the <code>ScrollPanel</code> wrapping a <code>TextArea</code>, attach the handler to it - the <code>OnScroll</code> does NOT fire. I can see the composite widget on screen and no compile or runtime errors are displayed but still - nothing happens when I scroll.</p>
  
  <p>Any ideas?</p>