[Address Book v2] Make the address book global

[fernandomg]

cf. Trello activity and problem statement

Title/Description

Currently, each safe has its own AB. We want to make it global for all safes for a given user.

Requirements

• AB should be visible to all safes
• A global localStorage item per domain/network
• All name-address connections should come from AB (not settings)

Data structure

The address book should be a list of records like this:

type AddressBookEntry = {
  address: string: // the contact address
  name: string; // human-readable name
  chainId: number; // see https://chainid.network
}

Persistence layer

Simplify the logic that saves/restores the AB from the localStorage. Consider using a Redux plugin for that.

[tschubotz]

I think abi could be left out. There is this linked ticket (#948), yes, but currently we have no plans to have this.