I am trying to "streamline" the site from time to time and clean up functions which might have become redundant.

I thought nobody uses the shopping list, because of the spec sheet, which displays quite the same info, except the highly unreliable money column.

The shopping list is still there, but hidden:

Open one of your racks and change the URL in the browser adressbar from

modulargrid.net/e/racks/view/[your Rack Id]
to
modulargrid.net/e/racks/shopping_list/[your Rack Id]

Beep, Bopp, Bleep: info@modulargrid.net