added spend unconfirmed option back into advanced settings

src/js/controllers/advancedSettings.js

@@ -4,7 +4,9 @@ angular.module('copayApp.controllers').controller('advancedSettingsController',
 
   var updateConfig = function() {
     var config = configService.getSync();
-
+    $scope.spendUnconfirmed = {
+      value: config.wallet.spendUnconfirmed
+    };
     $scope.recentTransactionsEnabled = {
       value: config.recentTransactions.enabled
     };
@@ -14,6 +16,17 @@ angular.module('copayApp.controllers').controller('advancedSettingsController',
 
   };
 
+  $scope.spendUnconfirmedChange = function() {
+    var opts = {
+      wallet: {
+        spendUnconfirmed: $scope.spendUnconfirmed.value
+      }
+    };
+    configService.set(opts, function(err) {
+      if (err) $log.debug(err);
+    });
+  };
+
   $scope.nextStepsChange = function() {
     var opts = {
       hideNextSteps: {

src/js/services/configService.js

@@ -157,9 +157,6 @@ angular.module('copayApp.services').factory('configService', function(storageSer
         // Always support Bitcoin Cash
         configCache.cashSupport = true;
 
-        // Always be able to spend unconfirmed transactions
-        configCache.wallet.spendUnconfirmed = true;
-
         if (!configCache.recentTransactions) {
           configCache.recentTransactions = defaultConfig.recentTransactions;
         }

www/views/advancedSettings.html

@@ -7,6 +7,16 @@
 
   <ion-content>
     <div class="settings-list list">
+
+      <ion-toggle class="has-comment" ng-model="spendUnconfirmed.value" toggle-class="toggle-balanced" ng-change="spendUnconfirmedChange()">
+        <span class="toggle-label" translate>Use Unconfirmed Funds</span>
+      </ion-toggle>
+      <div class="comment" translate>
+        If enabled, wallets will also try to spend unconfirmed funds. This option may cause transaction delays.
+      </div>
+
+      <div class="item item-divider"></div>
+
       <ion-toggle class="has-comment" ng-model="recentTransactionsEnabled.value" toggle-class="toggle-balanced" ng-change="recentTransactionsChange()">
         <span class="toggle-label" translate>Recent Transaction Card</span>
       </ion-toggle>