Merge branch 'implementUdUnit' into 'master'

assets/translations/en.json

assets/translations/es.json

assets/translations/fr.json

integration_test/scenarios/cert_state.dart

integration_test/scenarios/gecko_complete.dart

integration_test/scenarios/migrate_cesium_identity.dart

integration_test/scenarios/ud_creation_state.dart

integration_test/utility/general_actions.dart

integration_test/utility/tests_utility.dart

lib/models/widgets_keys.dart

lib/providers/duniter_indexer.dart

lib/providers/home.dart

lib/providers/substrate_sdk.dart

lib/providers/wallet_options.dart

lib/screens/activity.dart

lib/screens/home.dart

lib/screens/myWallets/choose_wallet.dart

lib/screens/myWallets/import_g1_v1.dart

lib/screens/myWallets/migrate_identity.dart

lib/screens/myWallets/wallets_home.dart