views: preserve full URL on redirect_to_login() for protected pages (fixes #18816)

combo/public/views.py

@@ -341,7 +341,7 @@ def publish_page(request, page, status=200, template_name=None):
     if not page.is_visible(request.user):
         if not request.user.is_authenticated():
             from django.contrib.auth.views import redirect_to_login
-            return redirect_to_login(request.path)
+            return redirect_to_login(request.build_absolute_uri())
         raise PermissionDenied()
 
     if page.redirect_url: