A signal type `wallet` which had an event `type` set to `sing-transactions` is now a new signal
type `wallt.sing.transactions` with event which represents list of transactions that need to be signed.
Refactor the activity filter session API to account for the new structure
Also:
- Refactor test helpers to mock for different chains with mixed answers
- Test implementation
Updates status-desktop #12120
Sale Djenic
Stefan
Dario Gabriel Lipicar
Anthony Laibe