Make the result list wrap when going up or down
Merge pull request #1928 from quicksilver/t/wrap-result-list

Make the result list wrap when going up or down
mention #1928 in the release notes
Merge branch 't/purge-deadlocks' of github.com:quicksilver/Quicksilver into t/purge-deadlocks
combine loaded sets so we only enumerate once

and enable concurrent enumeration