title: UITableViewCell set Border
body: <p>I have a normal <code>UITableViewCell</code> with custom colors, but how can i change the border?</p>
  
  <p>Currently it looks very ugly:</p>
  
  <p><img src="https://i.stack.imgur.com/3bMdD.png" alt="Screenshot"></p>
  
  <p>I only want a tiny little white border.</p>