title: Select form element won't expand when clicked in fullcalendar
body: <p>In the following <a href="https://codepen.io/akaspick/pen/eYzbmvQ" rel="nofollow noreferrer">fullcalendar example</a> (using v5.3.2) I've added a select element to the events, but the select elements won't expand when clicked, and so the value can't be changed.</p>
  <p>I've updated the code example to insert the select tag into the DOM via the eventDidMount callback (which is what I do in my own code) and added jquery to add the event handler for the clicks on the select. You can see the clicks triggering in the console, but the select won't actually expand.</p>
  <p>Is there any way to allow the select elements to be functional?</p>
  <pre><code>eventDidMount: function(arg) {
    let content = $('&lt;select&gt;&lt;option&gt;1&lt;/option&gt;&lt;option&gt;2&lt;/option&gt;&lt;/select&gt;')
    $(content).on('click', function(evt){
      console.log(evt.target.tagName)
    })
    
    $('.fc-event-time', arg.el).before(content) 
  }
  </code></pre>