Automatically update network configs on fresh install

[ckpringle]

The Chore

This chore is to automatically update the network configs when you update / install a new version of the desktop wallet, so that existing users have a smoother experience installing and using newer versions.

Background

Currently network configs do not update on a new install. This can introduce problems for example break links from the app to explorer etc.

Tasks

• [ ] What do we need to do first
• [ ] and then what?
• [ ] Etc.

Additional details / background info