[FIX] partner_profiles_portal: issue with structure writing rights

It was impossible to read or edit structure profiles from the portal.
Solved with:
- the add of a dependency to "partner_contact_in_several_companies"
add-on
- the modification of a security rule to consider the structure public profile

partner_profiles_portal/models/res_partner.py

@@ -39,6 +39,9 @@ class res_partner(models.Model):
         "other_contact_ids",
         "other_contact_ids.edit_structure_main_profile",
         "other_contact_ids.edit_structure_public_profile",
+        "child_ids",
+        "child_ids.edit_structure_main_profile",
+        "child_ids.edit_structure_public_profile",
     )
     def _compute_can_edit(self):
         for partner in self: