Virtual IP Address Type

I understand this was possibly mentioned years ago, but it would be incredibly useful to be able to add a 'type' of IP set to 'Virtual'. 

I believe there was some issues that were mentioned about having an IP address assigned to two different devices. My request is more or less a subset by just implementing a new IP 'type' from the dropdown.

Having the general ability to edit those types to not be strictly locked to 'Static', 'Reserved', and 'DHCP' would be fantastic as well.