modernize UI

assets/translations/en.json

assets/translations/es.json

assets/translations/fr.json

integration_test/utility/general_actions.dart

lib/extensions.dart

lib/providers/my_wallets.dart

lib/providers/substrate_sdk.dart

lib/providers/wallet_options.dart

lib/screens/home.dart

lib/screens/myWallets/custom_derivations.dart

lib/screens/myWallets/import_g1_v1.dart

lib/screens/myWallets/show_seed.dart

lib/screens/myWallets/unlocking_wallet.dart

lib/screens/myWallets/wallet_options.dart

lib/screens/myWallets/wallets_home.dart

lib/screens/my_contacts.dart

lib/screens/onBoarding/11_congratulations.dart

lib/screens/onBoarding/5.dart

lib/screens/onBoarding/6.dart

lib/screens/qrcode_fullscreen.dart