Fix lazy loading of redirect url in dashboard view

AKDashboard/views.py

@@ -6,5 +6,7 @@ from AKModel.models import Event
 
 class TopLevelRedirectView(RedirectView):
     is_permanent = False
-    url = reverse_lazy('submit:submission_overview',
+
+    def get_redirect_url(self, *args, **kwargs):
+        return reverse_lazy('submit:submission_overview',
                        kwargs={'event_slug': Event.objects.filter(active=True).last().slug})