[代码完善](v2.5): v2.5 beta 修复角色管理中分配菜单后子菜单丢失的问题

问题：角色管理中的分配菜单由于是懒加载的，导致保存分配的菜单时只保存了选择的父节点
修复：在保存前先将部分菜单加载出来

2.5 Beta 详情：https://www.ydyno.com/archives/1225.html

src/views/system/user/index.vue

@@ -204,7 +204,7 @@
 <script>
 import crudUser from '@/api/system/user'
 import { isvalidPhone } from '@/utils/validate'
-import { getDepts, getSuperior } from '@/api/system/dept'
+import { getDepts, getDeptSuperior } from '@/api/system/dept'
 import { getAll, getLevel } from '@/api/system/role'
 import { getAllJob } from '@/api/system/job'
 import CRUD, { presenter, header, form, crud } from '@crud/crud'
@@ -415,7 +415,7 @@ export default {
       })
     },
     getSupDepts(deptId) {
-      getSuperior(deptId).then(res => {
+      getDeptSuperior(deptId).then(res => {
         this.depts = res.content.map(function(obj) {
           if (obj.hasChildren && !obj.children) {
             obj.children = null