Product/Taxonomy enhancement

[triptec]

We should add the taxonomy sidebar to the taxonomy pages aswell so that it looks more like the products page

[hhff]

👍 agree!

We're already finding all of the taxons just to filter for the current taxon:

https://github.com/hhff/spree-ember/blob/master/packages/storefront/app/routes/spree/taxons/index.js#L23

We can probably just find all of the taxonomies instead, then in setupController we could filter for the current taxon and set it there to save requests