title: Full Calendar revert an external drop event
body: <p>I'm a complete beginner regarding the Full Calendar, so apologies for a possible simple question.
  I am trying to revert a drop from an External Event. If I use the revertFunc(), the event snaps back to it's original position in the list but the event is still on the calendar until it is refreshed. Ideally I would like it to disappear as soon as the dialog box is closed. This is the code </p>
  
  <pre><code>drop: function(date, jsEvent, ui, resourceId) 
  {
    var tag = $(this).data('event').tag;
    var eventDate = $(this).data('event').projectDate;
    var calDate =  date.format();
  
    if (tag == PSTag) 
    {                                              
      if(eventDate != calDate)
      {
        alert('You must drop the event on the correct date'); 
        revertFunc();
        return;
      }
      var eventObjectId = $(this).data('event').schWork;
    }
  
    if (tag == WOTag) 
    {                                              
      var eventObjectId = $(this).data('event').workorder;
    }
  
    var title = $(this).data('event').title;
    alert(tag);    
    updateCalendarEvent(eventObjectId, date.format(), resourceId, tag, title);  
  
    if (tag != PHTag) 
    {                                              
      $(this).remove();
    }    
    setupDraggableEvents();
  }
  </code></pre>
  
  <p>Many thanks for any assistance</p>