[Bug Report]input组件在启用append和字数统计时，统计的文本和append的东西重叠

[yanjiachao2012]

Environment

谷歌

Reproduction link

https://www.iviewui.com/view-ui-plus/component/form/input

Steps to reproduce

开启append和字数统计

What is expected?

不覆盖

What is actually happening?

目前覆盖