misc: add user to context dict, for compatibility

combo/data/models.py

@@ -480,6 +480,7 @@ class CellBase(models.Model):
             return ''
         context = RequestContext(RequestFactory().get(self.page.get_online_url()), {'synchronous': True})
         context['request'] = context.request # for compatibility
+        context['user'] = None # compat
         if not self.is_relevant(context):
             return ''
         from HTMLParser import HTMLParser