BootVault Licence Upgrades

Move an existing BootVault licence up an edition. Upgrades are priced as the difference between editions.

What upgrading to Nyxor unlocks

Nyxor adds SeedVault Shamir recovery, BlackHole decoy protection, and Citadel M-of-N multisig approval, which works on all 22 supported networks including those with no native multisig of their own.