title: onchange event with bootstrap4xpages control
body: <p>Hello I need to use <strong>Select2 enhanced Combo box:</strong> but seem that the event handler doesn't work.
  Can someone confirm that?
  I have select the event from a combo....but nothign partial update are executed</p>
  
  <p><img src="https://i.stack.imgur.com/A5HNA.png" alt="enter image description here"></p>