[0.85] more work on drpodown paging


git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@20779 35612d4c-9d10-0410-837c-bf9dd1be60d7
[0.85] Drop rulecache files fixed #4301


git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@20780 35612d4c-9d10-0410-837c-bf9dd1be60d7