Change serial displaying in dashboard
Change serial displaying in dashboard

When pdns not give us serial just notified serial, we need
to display that.
ivanfilippov/PowerDNS-Admin,ivanfilippov/PowerDNS-Admin,0x97/PowerDNS-Admin,0x97/PowerDNS-Admin,ivanfilippov/PowerDNS-Admin,0x97/PowerDNS-Admin,ivanfilippov/PowerDNS-Admin,0x97/PowerDNS-Admin