title: QListWidget color-alternated rows on empty area
body: <p>I've been trying to copy my QTreeView style/behavior to my QListWidget. Everything works fine except when trying to apply that style: <code>paint-alternating-row-colors-for-empty-area</code> which, in a way, make sense because that tag should only be supported by QTreeView.</p>
  
  <p>Do you guys know a good way to re-implement that behavior?
  Maybe I can tweak my QAbstractItemView? Or try to go with a QListView + Custom model?</p>
  
  <p>Please find enclosed what it's look like on my QTreeView:
  <img src="https://i.stack.imgur.com/ACnOU.jpg" alt="QTreeView lookk"></p>
  
  <p>And here is my current QListWidget:</p>
  
  <p><img src="https://i.stack.imgur.com/td22W.jpg" alt="enter image description here"></p>
  
  <p>And here is the Style Sheet I used on both:</p>
  
  <pre><code>QListWidget,
  QTreeView
  {
      border: 0px;
      color: white;
      paint-alternating-row-colors-for-empty-area: 1;
      background-color: #292929;
      alternate-background-color: #2C2C2C;
  }
  </code></pre>
  
  <p>Edit:
  So, I know that I can replace my QListWidget by another QTreeView, but the thing is, would I be able to get custom item like that using a QTreeView? <img src="https://i.stack.imgur.com/mwscy.png" alt="enter image description here"></p>