webadmin: disable add profile in Net->Profiles subtab for non-vm networks

On the 'Network' main-tab --> 'Vnic Profiles' sub tab -  the 'New vnic
profile' action should be disabled if the selected network is
non-vm.

Change-Id: I7fcb31873285999a6fe05790fc9d62a250b5b4e3
Signed-off-by: Alona Kaplan <alkaplan@redhat.com>