Fix bug in https://bugzilla.redhat.com/show_bug.cgi?id=1024555

Fix issue with statistic not accurate in document list: https://bugzilla.redhat.com/show_bug.cgi?id=1024555
    - detach project statistic from document statistic
    - format hours(Math.ceil) for statistic
    - format percentage(Math.floor) for statistic