Fix django.jQuery select change events

jet/static/jet/js/src/features/selects.js

@@ -189,6 +189,10 @@ Select2.prototype = {
             };
         }
 
+        $select.on('change', function(e) {
+            django.jQuery($select.get(0)).trigger(e);
+        });
+
         $select.select2(settings);
     },
     initSelect2: function() {