refac utils

integration_test/utility/tests_utility.dart

lib/providers/duniter_indexer.dart

lib/providers/substrate_sdk.dart

lib/providers/wallet_options.dart

lib/screens/myWallets/import_g1_v1.dart

lib/screens/myWallets/manage_membership.dart

lib/screens/myWallets/migrate_identity.dart

lib/screens/myWallets/wallet_options.dart

lib/screens/qrcode_fullscreen.dart

lib/screens/transaction_in_progress.dart

lib/utils.dart

lib/widgets/cert_tile.dart

lib/widgets/certify/certify_button.dart

lib/widgets/contacts_list.dart

lib/widgets/header_profile.dart

lib/widgets/history_view.dart

lib/widgets/payment_popup.dart

lib/widgets/search_identity_query.dart

lib/widgets/search_result_list.dart

lib/widgets/transaction_in_progress_tile.dart