增加扩展机制定位文件；将common模块实现扩展模式；发布新版本；

app/common/constants/MenuConstant.php

@@ -1,24 +1,13 @@
 <?php
 
-
 namespace app\common\constants;
 
+use base\common\constants\MenuConstantBase;
+
 /**
  * 菜单常量
- * Class MenuConstant
- * @package app\common\constants
+ * Class MenuConstant.
  */
-class MenuConstant
+class MenuConstant extends MenuConstantBase
 {
-
-    /**
-     * 首页的PID
-     */
-    const HOME_PID = 99999999;
-
-    /**
-     * 模块名前缀
-     */
-    const MODULE_PREFIX = 'ulthon_admin_';
-
-}
+}