This fixes a bug in which you could set the Primary Address of the NavPi to be an address that isn't in the Pi's wallet.
This prevents:
- A case where people had manually set a primary address, and then changed the wallet.dat stored in the NavPi, which would prevent the address from auto-updating to an address of the new wallet.
- Prevents people from accidentally setting the wrong address.
The NavPi v1.0.8 .img can be downloaded from www.Navcoin.org/downloads