app/overrides/add_pages_to_admin_sidebar_menu.rb
if Spree.version.to_f < 4.0
Deface::Override.new(
virtual_path: 'spree/layouts/admin',
name: 'pages_admin_sidebar_menu',
insert_bottom: '#main-sidebar',
partial: 'spree/admin/shared/pages_sidebar_menu'
)
else
Deface::Override.new(
virtual_path: 'spree/admin/shared/_main_menu',
name: 'pages_admin_sidebar_menu',
insert_bottom: 'nav',
partial: 'spree/admin/shared/pages_sidebar_menu'
)
end