Fix bug: Show all items when "All" tab is active

examples/typescript-angular/js/Application.js

@@ -129,7 +129,7 @@ var todos;
         TodoCtrl.prototype.onPath = function (path) {
             this.$scope.statusFilter = (path === '/active') ?
                 { completed: false } : (path === '/completed') ?
-                { completed: true } : null;
+                { completed: true } : {};
         };
         TodoCtrl.prototype.onTodos = function () {
             this.$scope.remainingCount = this.filterFilter(this.todos, { completed: false }).length;

examples/typescript-angular/js/controllers/TodoCtrl.ts

@@ -52,7 +52,7 @@ module todos {
 		onPath(path: string) {
 			this.$scope.statusFilter = (path === '/active') ?
 				{ completed: false } : (path === '/completed') ?
-				{ completed: true } : null;
+				{ completed: true } : {};
 		}
 
 		onTodos() {

examples/typescript-angular/js/interfaces/ITodoScope.ts

@@ -10,8 +10,8 @@ module todos {
 		doneCount: number;
 		allChecked: boolean;
 		reverted: boolean;
-		statusFilter: { completed: boolean; };
+		statusFilter: { completed?: boolean };
 		location: ng.ILocationService;
 		vm: TodoCtrl;
 	}
-}
\ No newline at end of file
+}