title: how to set bottom line width of the border of the component?
body: <p>This way is not working:</p>
  
  <pre><code>this.items = [
          {
              height: 35,
              layout: 'hbox',
              border: '0 0 3 0',
              items: [.....
  </code></pre>
  
  <p>Does anybody know how to show only bottom line of the border?</p>