Do not use days for display of total durations  : fixed #4284 for stats


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@20467 35612d4c-9d10-0410-837c-bf9dd1be60d7
minro fix


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@20469 35612d4c-9d10-0410-837c-bf9dd1be60d7