Make the list of partners the new entry point to manage them
Make the list of partners the new entry point to manage them

This commit updates the link to add a new partner by a link going to the list of partners, thus making this list the new entry point in the admin area when it comes to managing partners.
We also slightly tweak the description of the section.

monnaie-valheureux/radisse,monnaie-valheureux/radisse