Clean display

git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@21901 35612d4c-9d10-0410-837c-bf9dd1be60d7
Clean display for checkbox matrix

git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@21902 35612d4c-9d10-0410-837c-bf9dd1be60d7