Selection panel fixed in viewport when scrolling page.

[Fnxxxxo]

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

Version

1.7.7

Environment

Vue#2.5.17

Reproduction link

Steps to reproduce

1. Build a absolute panel with a multi-selection.
2. Open the multi-selection and scroll the page.

What is expected?

The option panel move with the selection panel.

What is actually happening?

The option panel fixed in viewport and selection scrolled away.

[tangjinzhou]

https://www.antdv.com/docs/vue/faq/#Select-Dropdown-DatePicker-TimePicker-Popover-Popconfirm-scroll-with-the-page?

[tangjinzhou]

Use to render component inside the scroll area. (Or other getXxxxContainer props).

[github-actions]

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