* Added An option which create new event in acknowledge workflow dialog.
* In event_workflow, variables named follow_up_ticket_title and follow_up_ticket_type are updated only when transition or new  state specify a new value.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@21134 20353a03-c40f-0410-a6d1-a30d3c3de9de