Set fees in preferences. First step for advanced send

src/js/controllers/preferencesFee.js

@@ -0,0 +1,21 @@
+'use strict';
+
+angular.module('copayApp.controllers').controller('preferencesFeeController',
+  function($rootScope, configService) {
+
+    this.save = function(newFee) {
+      var opts = {
+        wallet: {
+          settings: {
+            feeLevel: newFee
+          }
+        }
+      };
+      $rootScope.$emit('Local/FeeLevelUpdated', newFee);
+
+      configService.set(opts, function(err) {
+        if (err) $log.debug(err);
+      });
+
+    };
+  });