[RFR] Add menuView

![image](https://cloud.githubusercontent.com/assets/99944/5332763/41b4eec2-7e62-11e4-90d9-917c2ac2bfd6.png)

Closes #113
No, because the `OrderElement` filter will call `order` on the current item (the Entity), while I want to order by the `menuView.order()`