webadmin: Don't track default profile name if overridden

If user inputs a name for the default profile name, stop changing it
according to the network's name.

Change-Id: I468c3dcd4deb05aebaaaddf0035fac0e0d9509b7
Bug-Url: https://bugzilla.redhat.com/1025170
Signed-off-by: Lior Vernia <lvernia@redhat.com>