webadmin: Added VNIC profiles to imported networks

The public use checkbox had been useless since VNIC profiles were
introduced since networks don't have a public use member anymore, this
fixes it.

Change-Id: I79bd4ccc581e282a03ae4426e0fc8c58bbdfa29a
Signed-off-by: Lior Vernia <lvernia@redhat.com>