try to fix word / outlook mail import


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@20480 35612d4c-9d10-0410-837c-bf9dd1be60d7
clean last


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@20481 35612d4c-9d10-0410-837c-bf9dd1be60d7
Fatal error correction : undefined constant Ticket::OBSERVER

git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@20483 35612d4c-9d10-0410-837c-bf9dd1be60d7
Add history on groups

git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@20486 35612d4c-9d10-0410-837c-bf9dd1be60d7