added option to enable and disable sound

src/js/controllers/confirm.js

@@ -607,7 +607,7 @@ angular.module('copayApp.controllers').controller('confirmController', function(
         (processName == 'sendingTx' && !$scope.wallet.canSign() && !$scope.wallet.isPrivKeyExternal())
       ) && !isOn) {
       $scope.sendStatus = 'success';
-      if ($scope.wallet.coin == 'bch') {
+      if (config.soundsEnabled && $scope.wallet.coin == 'bch') {
         var audio = new Audio('misc/bch_sent.mp3');
         audio.play();
       }

src/js/controllers/preferencesNotifications.js

@@ -28,6 +28,11 @@ angular.module('copayApp.controllers').controller('preferencesNotificationsContr
       value: isEmailEnabled && $scope.newEmail.value ? true : false
     };
 
+    var isSoundEnabled = config.soundsEnabled ? config.soundsEnabled : false;
+    $scope.sounds = {
+      value: isSoundEnabled
+    };
+
     $timeout(function() {
       $scope.$apply();
     });
@@ -72,6 +77,16 @@ angular.module('copayApp.controllers').controller('preferencesNotificationsContr
     emailService.updateEmail(opts);
   };
 
+  $scope.soundNotificationsChange = function() {
+    if (!$scope.sounds) return;
+    var opts = {
+      soundsEnabled: $scope.sounds.value
+    };
+    configService.set(opts, function(err) {
+      if (err) $log.debug(err);
+    });
+  };
+
   $scope.save = function() {
     emailService.updateEmail({
       enabled: $scope.emailNotifications.value,

src/js/services/configService.js

@@ -106,6 +106,8 @@ angular.module('copayApp.services').factory('configService', function(storageSer
       enabled: false,
     },
 
+    soundsEnabled: false,
+
     log: {
       filter: 'debug',
     },

www/views/preferencesNotifications.html

@@ -29,6 +29,10 @@
         <span class="toggle-label" translate>Enable email notifications</span>
       </ion-toggle>
 
+      <ion-toggle ng-model="sounds.value" toggle-class="toggle-balanced" ng-change="soundNotificationsChange()">
+        <span class="toggle-label" translate>Enable sound</span>
+      </ion-toggle>
+
       <div ng-if="emailNotifications.value">
         <div class="settings-explanation">
           <div class="settings-description" translate>