Allow NAT IP (Inside) field to be able to also choose IP Prefixes

[jronnblom]

We currently NAT for example 10.10.10.0/24 to 192.168.1.10 and 11.11.11.0/24 to 192.168.1.11. Where the 192.168.1.0/24 represent our public ip space. So all clients on the 10.10.10.0 network would be NATed through the 192.168.1.10.

When editing the ip 192.168.1.10 Id like to be able to set NAT IP (Inside) to the 10.10.10.0/24 IP Prefix.