Support VLANs on interfaces

[ananace]

This will depend on ananace/fog-hyperv#16 for the actual backend code, but the UI would need to be extended to allow setting the VLAN information in a reasonable manner.

https://docs.microsoft.com/en-us/powershell/module/hyper-v/set-vmnetworkadaptervlan?view=win10-ps

Would require options for VLAN type, as well as information required for each VLAN mode. The most likely one would probably be Access, Trunk, or Untagged. Though Isolated and Promiscuous might be good to support as well.