角色菜单改造完成，去除权限管理，采用按钮方式显示在菜单管理中

src/components/Dict/Dict.js

@@ -8,7 +8,7 @@ export default class Dict {
 
   async init(names, completeCallback) {
     if (names === undefined || name === null) {
-      throw new Error('need dict names')
+      throw new Error('need Dict names')
     }
     const ps = []
     names.forEach(n => {