vcard-manager: copy vcards using WockyNodeTree.
vcard-manager: copy vcards using WockyNodeTree.

This is actually less efficient than what was there before, because it
copies the tree twice. I think this is symptomatic of Gabble's edit
representation being wrong.

Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,Ziemin/telepathy-gabble