Keep a global list of all known Roles
This is to facilitate a view with a list of a user's roles.
Patch by: Sverre Rabbelier
from django.contrib import admin
from django.contrib.sites.models import Site
class SiteAdmin(admin.ModelAdmin):
list_display = ('domain', 'name')
search_fields = ('domain', 'name')
admin.site.register(Site, SiteAdmin)