fix dropdown translation session store and load

git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@21148 35612d4c-9d10-0410-837c-bf9dd1be60d7
[0.85]fix completename generation for dropdown translations

git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@21149 35612d4c-9d10-0410-837c-bf9dd1be60d7