title: How to change the line between two elements in listview
body: <p>Imagine a basic ListView, like this:</p>
  
  <pre><code>Item1
  ---------
  Item2
  ---------
  Item3
  ---------
  Item4
  </code></pre>
  
  <p>How do I change the color or width of ------ the line that divides each item in a ListView?</p>