Fix Ethereum network for anonpay invoice (#1051)

lib/anonpay/anonpay_api.dart

@@ -182,6 +182,8 @@ class AnonPayApi {
     switch (currency) {
       case CryptoCurrency.usdt:
         return CryptoCurrency.btc.title.toLowerCase();
+      case CryptoCurrency.eth:
+        return 'ERC20';
       default:
         return currency.tag != null ? _normalizeTag(currency.tag!) : 'Mainnet';
     }

lib/src/screens/receive/anonpay_invoice_page.dart

@@ -154,6 +154,7 @@ class AnonPayInvoicePage extends BasePage {
                         ? S.of(context).create_invoice
                         : S.of(context).create_donation_link,
                     onPressed: () {
+                      FocusScope.of(context).unfocus();
                       anonInvoicePageViewModel.setRequestParams(
                         inputAmount: _amountController.text,
                         inputName: _nameController.text,