Switch to side-by-side view

--- a/Allura/allura/model/repo.py
+++ b/Allura/allura/model/repo.py
@@ -99,7 +99,7 @@
 CommitRunDoc = collection(
     'repo_commitrun', main_doc_session,
     Field('_id', str),
-    Field('parent_commit_ids', [str]),
+    Field('parent_commit_ids', [str], index=True),
     Field('commit_ids', [str], index=True),
     Field('commit_times', [datetime]))