title: UITableView not shown inside UIStackView
body: <p>I have a <code>UIStackView</code> where it can show a label, image, table view or nothing based on user selection. Here is my current hierarchy for the dynamic view:</p>
  
  <ul>
  <li>UIStackView_Parent
  
  <ul>
  <li>UILabel - some text, fixed view</li>
  <li>UIStackView_Child - this is the container that can show multiple things or nothing</li>
  <li>UIView - another fixed view</li>
  </ul></li>
  </ul>
  
  <p>When I call <code>UIStackView_Child.addArrangedSubview(...)</code> with a label or image it works perfectly, but <code>addArrangedSubview(tableView)</code> does not show the table. I have <code>tableView.scrollEnabled = false</code> and set frame to fixed height based on number of cell and defined the table's <code>cellHeight</code>. </p>
  
  <p>Any help would be much appreciated, thanks!</p>