- [x] I have searched the [issues](https://github.com/ant-design/ant-design-mobile/issues) of this repository and believe that this is not a duplicate. ### What problem does this feature solve? 不立即隐藏的情况下,拖放屏幕滚动时 Popover 一直固定在同一个位置上,和 trigger 分离。如图示:  ### What does the proposed API look like? 希望 touchstart 页面其他位置时,立即隐藏 Popover 组件。 <!-- generated by ant-design-issue-helper. DO NOT REMOVE -->