PortionAddView: Support order
Remove the isfluid thing, and add gram display to recipe details.
Recipe detail template: Show ingredient selection first.

This is a bit annoying as it's a different order than usual, but
the ingredient affects which portionsize we can choose in the first
place.
Portionsize delete: Show recipes using this.

This is to avoid accidentally editing and breaking recipes that
still use a portionsize that's supposed to be deleted.
Recipe detail: Add drag handle to ingredient list.

The new handle makes it possible to interact with the rest of the
ingredient list more easily for editing purposes.