vlan edit: Fix automatic field disabling

vlan edit: Fix automatic field disabling

The regex are are created as literals (with // and not new RegExp).
Therefore
 - The old Vlan_match value with double \\  has matched e.g. vlan\ddd instead
   of e.g. vlan123 and
 - the old VlanInterface_match value with double \\ has matched e.g.
   \www\X\dddd instead of e.g. vmbr0.1234

This fixes automatically disabling the fields vlan-raw-device and vlan-id (VLAN
tag) in the VLAN edit window.

Signed-off-by: Dominic Jäger <d.jaeger@proxmox.com>