It was a bad idea, in draft state, only assignor have all permission. If an assigne wan't more permission, some have to change the state of the application and assign it to the assignee

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@23826 20353a03-c40f-0410-a6d1-a30d3c3de9de