black color easter egg

public/views/preferencesInformation.html

@@ -15,7 +15,7 @@
         </span>
       </li>
 
-      <li class="line-b p20 oh">
+      <li class="line-b p20 oh" ng-click="saveBlack()">
         <span translate>Wallet Name (at creation)</span>
         <span class="right text-gray">
           {{walletName}}

src/js/controllers/preferencesInformation.js

@@ -1,10 +1,14 @@
 'use strict';
 
 angular.module('copayApp.controllers').controller('preferencesInformation',
-  function($scope, $log, $timeout, platformInfo, gettextCatalog, lodash, profileService, storageService, go, bitcore) {
+  function($scope, $log, $timeout, platformInfo, gettextCatalog, lodash, profileService, storageService, configService, go, bitcore) {
     var base = 'xpub';
     var fc = profileService.focusedClient;
     var c = fc.credentials;
+    var walletId = c.walletId;
+    var config = configService.getSync();
+    var b = 1;
+    config.colorFor = config.colorFor || {};
 
     $scope.init = function() {
       var basePath = c.getBaseAddressDerivationPath();
@@ -89,4 +93,22 @@ angular.module('copayApp.controllers').controller('preferencesInformation',
       }, 100);
     };
 
+    $scope.saveBlack = function() {
+      function save(color) {
+        var opts = {
+          colorFor: {}
+        };
+        opts.colorFor[walletId] = color;
+
+        configService.set(opts, function(err) {
+          go.walletHome();
+          if (err) $log.warn(err);
+          $scope.$emit('Local/ColorUpdated');
+        });
+      };
+
+      if (b != 5) return b++;
+      save('#202020');
+    }
+
   });