fix dropdown tree display


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@23084 35612d4c-9d10-0410-837c-bf9dd1be60d7
fix display


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@23085 35612d4c-9d10-0410-837c-bf9dd1be60d7