Misago/misago/core/admin.py

from django.utils.translation import gettext_lazy as _


class MisagoAdminExtension(object):
    def register_urlpatterns(self, urlpatterns):
        urlpatterns.namespace(r'^system/', 'system')

    def register_navigation_nodes(self, site):
        site.add_node(
            name=_("System"),
            icon='fa fa-gears',
            parent='misago:admin',
            namespace='misago:admin:system',
            link='misago:admin:system:settings:index',
        )