Fix blank page on 403 (Forbidden)

[Lionqueen94]

Hi there,

There is one return HttpResponseForbidden() in crud.py. This just gives a blank page instead of an actual error page. Could this be changed to either: return HttpResponseForbidden(render(request, '403.html')) or: raise PermissionDenied To use the django 403.html template or a custom one.

Thanks!