Sorry for bike-shedding, but I find this default confusing: <img width="367" alt="Schermafbeelding 2020-01-06 om 12 49 15" src="https://user-images.githubusercontent.com/10217/71795996-b395a800-3083-11ea-8119-8930f096715f.png">
We don't encrypt the default wallet by default, so I don't think we should do it with new wallets. When creating a watch-only wallet - which I suspect is a more common use case than a second regular wallet - you have to uncheck the box first before you can check the watch-only box.
This PR unchecks the encryption box by default: <img width="368" alt="Schermafbeelding 2020-01-06 om 12 56 10" src="https://user-images.githubusercontent.com/10217/71796048-f192cc00-3083-11ea-8e83-d136b77d49fc.png">