Ember JS index route with modal outlet

I try to make a menu with

• a list view (posts)
• each item of the list should have its subroute, an independent view, without the list (posts/post/1)
• menu should always have its active class
• a new route under the list view. (In my application it is actually a modal over the list)

I have managed to solve this, except for the last one: http://ift.tt/1RWt7Rv

posts/new should render under the posts list.