improve upload error messages


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@22806 35612d4c-9d10-0410-837c-bf9dd1be60d7
update locales


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@22807 35612d4c-9d10-0410-837c-bf9dd1be60d7