layout-sider 默认展开收起bug

[qq1119094779]

• I have searched the issues of this repository and believe that this is not a duplicate.

Version

1.5.5

Environment

"vue": "^2.6.11" mac chrome

Reproduction link

#2491

Steps to reproduce

产生原因： 默认是slider展开的，当屏幕小于993的时候silder是收起来的
使用defaultCollapsed 也是不可以的 因为我自定义了展开收起按钮

What is expected?

期望样式正常展示，

What is actually happening?

默认sider展开的 在手机上收起。 样式错乱
默认收起的 在pc上展开 元素未被删除。排版错乱

[sendya]

请使用 codesandbox https://codesandbox.io/s/2wpk21kzvr 提供复现

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.