[0.85] fix KB deletion on IE


git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@21475 35612d4c-9d10-0410-837c-bf9dd1be60d7
[0.85] minor fix


git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@21477 35612d4c-9d10-0410-837c-bf9dd1be60d7