Add admin/enterprises helper
Add admin/enterprises helper

Fixes:

Failure/Error: super

     ActionView::Template::Error:
       undefined method `add_check_if_single' for #<#<Class:0x0000564501a3c838>:0x00007f446cdd68e8>
     # ./app/helpers/application_helper.rb:20:in `method_missing'
     # ./app/views/spree/admin/shared/_hubs_sidebar.html.haml:16:in `block in _app_views_spree_admin_shared__hubs_sidebar_html_haml___1973426344114200431_69965928779540'
     # ./app/views/spree/admin/shared/_hubs_sidebar.html.haml:11:in `each'
     # ./app/views/spree/admin/shared/_hubs_sidebar.html.haml:11:in `_app_views_spree_admin_shared__hubs_sidebar_html_haml___1973426344114200431_69965928779540'
     # ./app/views/spree/admin/payment_methods/edit.html.haml:15:in `block in _app_views_spree_admin_payment_methods_edit_html_haml__571217921761730685_69965930474120'
     # ./app/views/spree/admin/payment_methods/edit.html.haml:11:in `_app_views_spree_admin_payment_methods_edit_html_haml__571217921761730685_69965930474120'
     # ./app/controllers/admin/resource_controller.rb:23:in `block (2 levels) in edit'
     # ./lib/spree/core/controller_helpers/respond_with.rb:24:in `respond_with'
     # ./app/controllers/admin/resource_controller.rb:22:in `edit'
     # ./lib/open_food_network/rack_request_blocker.rb:36:in `call'
     # ------------------
     # --- Caused by: ---
     # NoMethodError:
     #   undefined method `add_check_if_single' for #<#<Class:0x0000564501a3c838>:0x00007f446cdd68e8>
     #   ./app/helpers/application_helper.rb:20:in `method_missing'

openfoodfoundation/openfoodnetwork,Matt-Yorkley/openfoodnetwork,openfoodfoundation/openfoodnetwork,mkllnk/openfoodnetwork,lin-d-hop/openfoodnetwork,lin-d-hop/openfoodnetwork,mkllnk/openfoodnetwork,openfoodfoundation/openfoodnetwork,Matt-Yorkley/openfoodnetwork,Matt-Yorkley/openfoodnetwork,Matt-Yorkley/openfoodnetwork,mkllnk/openfoodnetwork,lin-d-hop/openfoodnetwork,openfoodfoundation/openfoodnetwork,mkllnk/openfoodnetwork,lin-d-hop/openfoodnetwork