Bandwidth by IP - display static map names also when FQDN selected

If display FQDN was selected, and an IP had no reverse lookup FQDN, but did have a DHCP static mapping, the static map name was not displayed - just 1 line I overlooked when adding the FQDN option.
Merge pull request #467 from phil-davis/master

Bandwidth by IP - display static map names also when FQDN selected