Merge branch 'release-4.2.4' into CAKE-345-batch-sending

# Conflicts:
#	lib/src/screens/send/send_page.dart

ios/Podfile.lock

@@ -290,5 +290,6 @@ SPEC CHECKSUMS:
   url_launcher: 6fef411d543ceb26efce54b05a0a40bfd74cbbef
   webview_flutter: 9f491a9b5a66f2573946a389b2677987b0ff8c0b
 
+PODFILE CHECKSUM: 82161cafcb98ddf3e6a0ff8149da3f656be3f1e3
 
-COCOAPODS: 1.10.1
+COCOAPODS: 1.9.3

lib/bitcoin/bitcoin_commit_transaction_exception.dart

@@ -0,0 +1,4 @@
+class BitcoinCommitTransactionException implements Exception {
+  @override
+  String toString() => 'Transaction commit is failed.';
+}

lib/bitcoin/pending_bitcoin_transaction.dart

@@ -1,3 +1,4 @@
+import 'package:cake_wallet/bitcoin/bitcoin_commit_transaction_exception.dart';
 import 'package:flutter/foundation.dart';
 import 'package:bitcoin_flutter/bitcoin_flutter.dart' as bitcoin;
 import 'package:cake_wallet/core/pending_transaction.dart';
@@ -33,7 +34,13 @@ class PendingBitcoinTransaction with PendingTransaction {
 
   @override
   Future<void> commit() async {
-    await electrumClient.broadcastTransaction(transactionRaw: _tx.toHex());
+    final result =
+      await electrumClient.broadcastTransaction(transactionRaw: _tx.toHex());
+
+    if (result.isEmpty) {
+      throw BitcoinCommitTransactionException();
+    }
+
     _listeners?.forEach((listener) => listener(transactionInfo()));
   }
 

lib/src/screens/unspent_coins/unspent_coins_list_page.dart

@@ -15,25 +15,25 @@ class UnspentCoinsListPage extends BasePage {
   @override
   String get title => S.current.unspent_coins_title;
 
-  @override
-  Widget trailing(BuildContext context) {
-    final questionImage = Image.asset('assets/images/question_mark.png',
-        color: Theme.of(context).primaryTextTheme.title.color);
+  //@override
+  //Widget trailing(BuildContext context) {
+  //  final questionImage = Image.asset('assets/images/question_mark.png',
+  //      color: Theme.of(context).primaryTextTheme.title.color);
 
-    return SizedBox(
-      height: 20.0,
-      width: 20.0,
-      child: ButtonTheme(
-        minWidth: double.minPositive,
-        child: FlatButton(
-            highlightColor: Colors.transparent,
-            splashColor: Colors.transparent,
-            padding: EdgeInsets.all(0),
-            onPressed: () => showUnspentCoinsAlert(context),
-            child: questionImage),
-      ),
-    );
-  }
+  //  return SizedBox(
+  //    height: 20.0,
+  //    width: 20.0,
+  //    child: ButtonTheme(
+  //      minWidth: double.minPositive,
+  //      child: FlatButton(
+  //          highlightColor: Colors.transparent,
+  //          splashColor: Colors.transparent,
+  //          padding: EdgeInsets.all(0),
+  //          onPressed: () => showUnspentCoinsAlert(context),
+  //          child: questionImage),
+  //    ),
+  //  );
+  //}
 
   final UnspentCoinsListViewModel unspentCoinsListViewModel;
 
@@ -64,7 +64,7 @@ class UnspentCoinsListFormState extends State<UnspentCoinsListForm> {
   }
 
   void afterLayout(dynamic _) {
-    showUnspentCoinsAlert(context);
+    //showUnspentCoinsAlert(context);
   }
 
   @override