title: QHeaderView has no horizontal lines in Windows 10
body: <p><a href="https://i.stack.imgur.com/0jey4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/0jey4.png" alt="enter image description here"></a></p>
  
  <p><code>QTableWidget</code> headers have no horizontal lines in Windows 10. How can I fix it?</p>