close exchange step 4 back to wallet or exchange home view

lib/models/exchange/incomplete_exchange.dart

@@ -15,6 +15,7 @@ class IncompleteExchangeModel extends ChangeNotifier {
   final ExchangeRateType rateType;
 
   final bool reversed;
+  final bool walletInitiated;
 
   String? _recipientAddress;
 
@@ -68,6 +69,7 @@ class IncompleteExchangeModel extends ChangeNotifier {
     required this.receiveAmount,
     required this.rateType,
     required this.reversed,
+    required this.walletInitiated,
     String? rateId,
   }) : _rateId = rateId;
 }

lib/pages/exchange_view/exchange_form.dart

@@ -558,6 +558,7 @@ class _ExchangeFormState extends ConsumerState<ExchangeForm> {
       rateType: rateType,
       rateId: estimate.rateId,
       reversed: estimate.reversed,
+      walletInitiated: walletInitiated,
     );
 
     if (mounted) {