Fix: Linear in stead of quadratic complexity in current_content que…

…ryset method.

djangocms_versioning/managers.py

@@ -72,11 +72,11 @@ def current_content(self, **kwargs):
         versions or published versions (in that order). This optimized query assumes that
         draft versions always have a higher pk than any other version type. This is true as long as
         no other version type can be converted to draft without creating a new version."""
-        qs = self.filter(versions__state__in=(constants.DRAFT, constants.PUBLISHED), **kwargs)
+        qs = self.filter(versions__state__in=(constants.DRAFT, constants.PUBLISHED))
         pk_filter = qs.values(*self._group_by_key)\
             .annotate(vers_pk=models.Max("versions__pk"))\
-            .values_list("vers_pk", flat=True)
-        return qs.filter(versions__pk__in=pk_filter)
+            .values("vers_pk")
+        return self.filter(versions__pk__in=pk_filter, **kwargs)
 
     def latest_content(self, **kwargs):
         """Returns the "latest" content object which is in this order