allow filtering by rack group
allow filtering by rack group

adds the ability to filter devices by rack group
Alphalink/netbox,snazy2000/netbox,digitalocean/netbox,digitalocean/netbox,snazy2000/netbox,lampwins/netbox,Alphalink/netbox,Alphalink/netbox,digitalocean/netbox,rfdrake/netbox,rfdrake/netbox,lampwins/netbox,snazy2000/netbox,lampwins/netbox,Alphalink/netbox,rfdrake/netbox,lampwins/netbox,rfdrake/netbox,digitalocean/netbox,snazy2000/netbox