title: Interface builder doesn't allow adding Table View Cell
body: <p>For an alert dialog, I added a UITableView, then while I try to Table View Cell the Interface Builders doesn't accept dropping Table View Cell "on" table view, please check screenshot, I should mention the root is UIView, not UIViewController:</p>
  
  <p><a href="https://i.stack.imgur.com/pdylX.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pdylX.png" alt="enter image description here"></a></p>