Fixes empty spaces appearing in the menu if a person is not allowed to see this menu or if no menu is defined.
Patch by: Lennard de Rijk
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)