Add:创建 flutter go web 版

lib/widgets/components/Menu/PopupMenuEntry/index.dart

@@ -0,0 +1,41 @@
+/// @Author: 一凨 
+/// @Date: 2018-12-27 14:51:58 
+/// @Last Modified by: 一凨
+/// @Last Modified time: 2018-12-27 16:06:20
+
+import 'package:flutter_web/material.dart';
+
+import 'package:flutter_go/components/widget_demo.dart';
+import '../PopupMenuDivider/demo.dart';
+
+const String content0 = '''
+### **简介**
+> Material 风格中 弹出菜单的一个基类
+- 如果需要创建一个显示弹出菜单的按钮，请考虑使用 PopupMenuButton.
+''';
+
+const String content1 = '''
+### **基本用法**
+- PopupMenuDivider 是一条水平分割线，注意数组要使用父类 PopupMenuEntry，配合其他 item 样式共同使用
+''';
+
+class Demo extends StatefulWidget {
+  static const String routeName = '/components/Menu/PopupMenuEntry';
+  _DemoState createState() => _DemoState();
+}
+
+class _DemoState extends State<Demo> {
+  @override
+  Widget build(BuildContext context) {
+    return WidgetDemo(
+      contentList: [
+        content0,
+        content1,
+        PopupMenuDividerDemo()
+      ],
+      docUrl: 'https://docs.flutter.io/flutter/material/PopupMenuEntry-class.html',
+      codeUrl: 'components/Menu/PopupMenuDivider/demo.dart',
+      title: 'PopupMenuEntry',
+    );
+  }
+}