Popup 组件有mountOnEnter和unmountOnExit两个参数，但这两个参数无法单独使用，是否考虑合并为一个 forceRender 呢？

[xiguaxigua]

• [x] I'm sure this does not appear in the issue list of the repository

Basic Info

What are the similar cases of this feature

https://mobile.ant.design/zh/components/popup

What problem does this feature solve?

当前提供了两个属性，但是单纯使用一个并不灵，容易引起误解，不如直接把两个属性合并为一个

[TinaPeach]

mountOnEnter和unmountOnExit是继承自react-transition-group的属性，Popup只做透传不做封装哈