[et-mgmt-tools] virtual network devices

[Stephen Hemminger <shemminger vyatta com>]

Trying to clear up some problems I went in and deleted the
virtual network device. Edit->Host Details->Virtual Networks

But now there is no way to add a new one (Add) is greyed out.
This is on Ubuntu Ibex and using KVM. 

Where is the configuration located so it can be fixed?