Fix bug ZK-1702: Invoke binder.loadAll() when the onChange event of the combobox will cause java error
http://tracker.zkoss.org/browse/ZK-1702
fine tune notification arrow position
exclude jfreechart version conflict
Merge remote-tracking branch 'VincentJian/B60-ZK-1702' into 6.0
re-fix bug ZK-1205 and ZTL-test ZK-1583