Allow expired DHCP leases to show last used hostname

[fyy]

I was wondering if it was possible to make it so greyed out expired leases still show their last used hostname from Status -> DHCP Leases?  The reason I ask is because keeping track of a handful of Hostname->MAC address relationships is fine, but when there's dozens/hundreds, it would be nice to know what the last hostname was of such and such MAC, even if it is expired.