I think this regression was introduced by commit f2a9467f91b2d34c5b8d7a653ff14562e2210015 which removed the _sync function, which set the actor visibility.

> -    _sync: function() {
> -        let nItems = this._connectionItems.size;
> -        this.item.actor.visible = (nItems > 0);

Created attachment 366465 [details] [review]
network: Fix visibility of VPN section

Commit f2a9467f91b was too eager to simplify the code, and removed
the bits that hid the section in case no VPNs are set up - add them
back to fix the visibility.

Gah, I had the fix sitting around locally and forgot to attach it :-(

Review of attachment 366465 [details] [review]:

lgtm

Attachment 366465 [details] pushed as f91fbd7 - network: Fix visibility of VPN section