Switch to side-by-side view

--- a/Allura/allura/model/artifact.py
+++ b/Allura/allura/model/artifact.py
@@ -576,6 +576,9 @@
             'pubdate',
             ('artifact_ref.project_id', 'artifact_ref.mount_point'),
             (('ref_id', pymongo.ASCENDING),
+             ('pubdate', pymongo.DESCENDING)),
+            (('project_id', pymongo.ASCENDING),
+             ('app_config_id', pymongo.ASCENDING),
              ('pubdate', pymongo.DESCENDING))]
 
     _id = FieldProperty(S.ObjectId)