title: Vaadin: TextArea scrolling doesn't work
body: <p>I have something similar to this code:</p>
  
  <pre><code>TextArea textArea = new TextArea();
  textArea.setSizeFull();
  Panel dataPanel = new Panel("Panel", textArea);
  dataPanel.setSizeFull();
  textArea.setValue(... some very long text...);
  </code></pre>
  
  <p>The problem is that this <strong>TextArea</strong> appears without vertical scrollbar (and mouse-wheel scrolling also doesn't work), although inner text is longer than TextArea height (I can navigate lower using cursor and keyboard down arrow).</p>
  
  <p>How do I enable scrolling in this component?</p>