Added support for grouping tasks by challenge (#8469)

* Added support for grouping tasks by chllenge

* Fixed tests and updated default challenge model name

* Fixed broken member test

* Updated setting string

* Changed to shortName

* Began abstracting task grouping

* Added initial task directive code

* Added new directives to help with grouping of tasks

* Removed random console.log

website/client-old/js/directives/task.directive.js

@@ -0,0 +1,24 @@
+'use strict';
+
+(function(){
+  angular
+    .module('habitrpg')
+    .directive('task', task);
+
+  task.$inject = [
+    'Shared',
+  ];
+
+  function task(Shared) {
+    return {
+      restrict: 'E',
+      templateUrl: 'templates/task.html',
+      scope: true,
+      link: function($scope, element, attrs) {
+        $scope.getClasses = function (task, user, list, main) {
+          return Shared.taskClasses(task, user.filters, user.preferences.dayStart, user.lastCron, list.showCompleted, main);
+        }
+      }
+    }
+  }
+}());