title: Extjs scrollable panel
body: <p>I have a panel where I insert some HTML from the server:</p>
  
  <pre><code>myPanel.update(response.responseText);
  </code></pre>
  
  <p>But if this text is too big, none of the scrollbars appear to navigate the text.</p>
  
  <p>How can I configure a vertical scrollbar in this panel?</p>
  
  <p>This is my panel definition:</p>
  
  <pre><code>{
    xtype:'panel',
    width: '100%',
    height: 300,
    id:'mypanel'
  },
  </code></pre>
  
  <p>Thanks.</p>