title: X-Editable in Bootstrap 4 modal not clickable
body: <p>I have a modal in a Bootstrap 4 design that has two XEditable text field on it.</p>
  
  <p>If I set the XEditable option to inline, it works fine (thought the table gets pushed aside, but I guess that's just a CSS fix). However, if it is set to popup, which I want, I can't click the textbox in the pop over?  Anyone have any idea why? I was thinking maybe the order, but not sure on how to change that?</p>
  
  <p>Screenshot attached.</p>
  
  <p><a href="https://i.stack.imgur.com/zUdh4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/zUdh4.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/96A1f.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/96A1f.png" alt="enter image description here"></a></p>