[0.85] fix dropdoxn for default value given by toadd

git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@20548 35612d4c-9d10-0410-837c-bf9dd1be60d7
[0.85] improve last


git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@20549 35612d4c-9d10-0410-837c-bf9dd1be60d7