title: QTreeView grid line color
body: <p>I am using QTreeView to display expandable table. But the grid is not showing on QTreeView like on QTableView. </p>
  
  <p>I have tried below code in Ui designer for the property styleSheet of treeview</p>
  
  <pre><code>gridline-color: rgba(255, 255, 255, 255);
  </code></pre>
  
  <p>But still the grid lines are invisible. What could be the issue?</p>