Update value of end date also in date picker

aleksis/apps/alsijil/templates/alsijil/absences/register.html

@@ -17,7 +17,7 @@
     $(document).ready(function () {
       $("#id_date_start").change(function () {
         $("#id_date_end").val($("#id_date_start").val());
-        $("#id_date_end").change();
+        initDatePicker("#id_date_end");
       });
     });
   </script>