修复角色添加页面重置按钮问题

VUECODE/smart-operate-manage/src/views/account/role/add/index.vue

     resetForm(formName) {
       this.$refs[formName].resetFields()
       // 清空选中的树节点
-      this.ruleForm.menuArray = []
+      this.$refs.tree.setCheckedKeys([]);
+      this.ruleForm.roleName = ''
+      this.ruleForm.description = ''
     },
     handleCheckChange(data, checked, indeterminate) { // 树形图选择事件
       console.log(data, checked, indeterminate)