Refresh list of peers.

[ken-de-moor]

Situation: The user starts planetary network for the first time, then doesn't use it for a month and comes back.

The application will try to connect to the same peers, but it's likely they no longer want to connect. There should be some logic that refreshes and updates the list of peers.

[ken-de-moor]

Re-opened.

Doesn't pass acceptance testing, no new peers are searched when no peers are found. Connection says "connected" even though nothing works. This isn't good UX, and requires a manual action that the user doesn't know about.

Can be fixed in next version though, since at least the option is there to manually fix itnow.

Expected behaviour: Connecting should work, if no or too little peers are found it should automatically refresh the config file and not make this a manual action.