add 'get_submenu_items' method to ModelAdminGroup, providing a more obvious method to override in order to add custom items
add 'get_submenu_items' method to ModelAdminGroup, providing a more obvious method to override in order to add custom items

ababic/wagtailmodeladmin,ababic/wagtailmodeladmin,rkhleics/wagtailmodeladmin,rkhleics/wagtailmodeladmin