Bug fixed B65-ZK-1913: AuResponse of stop comet server push would
override the request of start in some situation
http://tracker.zkoss.org/browse/ZK-1913
Bug ZK-1905: Chosenbox emptyMessage does not re-appear after remove all selected items
Merge branch 'master' of github.com:zkoss/zk
minor fix B65-ZK-1913.zul
Merge branch 'B65-ZK-1913' of git://github.com/RaymondChao/zk