fix repeated currencies

src/js/controllers/preferencesAltCurrency.js

@@ -19,15 +19,12 @@ angular.module('copayApp.controllers').controller('preferencesAltCurrencyControl
         var idx = lodash.indexBy(unusedCurrencyList, 'isoCode');
         var idx2 = lodash.indexBy($scope.lastUsedAltCurrencyList, 'isoCode');
 
-        completeAlternativeList = lodash.reject(rateService.listAlternatives(), function(c) {
+        completeAlternativeList = lodash.reject(rateService.listAlternatives(true), function(c) {
           return idx[c.isoCode] || idx2[c.isoCode];
         });
 
-        completeAlternativeList = completeAlternativeList.sort(function(a, b) {
-          return a.name.toLowerCase() > b.name.toLowerCase() ? 1 : -1;
-        });
-
         $scope.altCurrencyList = completeAlternativeList.slice(0, 10);
+
         $timeout(function() {
           $scope.$apply();
         });
@@ -85,6 +82,7 @@ angular.module('copayApp.controllers').controller('preferencesAltCurrencyControl
     $scope.$on("$ionicView.beforeEnter", function(event, data) {
       var config = configService.getSync();
       $scope.currentCurrency = config.wallet.settings.alternativeIsoCode;
+
       storageService.getLastCurrencyUsed(function(err, lastUsedAltCurrency) {
         $scope.lastUsedAltCurrencyList = lastUsedAltCurrency ? JSON.parse(lastUsedAltCurrency) : [];
         init();

src/js/services/rateService.js

@@ -111,18 +111,24 @@ RateService.prototype.fromFiat = function(amount, code) {
   return amount / this.getRate(code) * this.BTC_TO_SAT;
 };
 
-RateService.prototype.listAlternatives = function() {
+RateService.prototype.listAlternatives = function(sort) {
   var self = this;
   if (!this.isAvailable()) {
     return [];
   }
 
-  return self.lodash.map(this.getAlternatives(), function(item) {
+  var alternatives = self.lodash.map(this.getAlternatives(), function(item) {
     return {
       name: item.name,
       isoCode: item.isoCode
     }
   });
+  if (sort) {
+    alternatives.sort(function(a, b) {
+      return a.name.toLowerCase() > b.name.toLowerCase() ? 1 : -1;
+    });
+  }
+  return self.lodash.uniq(alternatives, 'isoCode');
 };
 
 angular.module('copayApp.services').factory('rateService', function($http, lodash) {