[ART] no "Add to Cart" button on item page

[djerek]

On the Art reservations app, they have a bug where the Add to Cart button does not show up on each item's page (.../equipment_models/2). They can still add an item to the cart by searching for it and clicking the add to cart button on the search page. On other videos, the add to cart button was correctly on the item page. I was unable to reproduce the issue.

[squidgetx]

CNR, also #12 optimizes/refactors this part of the view