The input box in Search and Select Users options can't get focus 搜索用户的选项中嵌入的输入框无法聚焦

[Combo819]

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

Reproduction link

Steps to reproduce

type in anything in the Select box, when the dropdown shows up, click any of the input boxes.
在选择器里输入任意文本，当下拉框出现时，点击任意一个选项中的输入框

What is expected?

The input box in option gets focus.
小输入框能聚焦

What is actually happening?

The input box in options can't get focus. User can't type in anything in the input box. That means the focus can only in Select.
小输入框不能聚焦，用户无法输入文本，强制聚焦在选择器上

Environment	Info
antd	3.20.3
React	16.8.6
System	win10
Browser	Chrome 75

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developing a feature that user can add a description to the option
开发着客户可以为选中的选项添加描述的功能

[bachchanvinh]

Is this bug solved ?

[afc163]

https://codesandbox.io/s/antd-auto-complete-forked-slq2kr?file=/index.js

[bachchanvinh]

https://codesandbox.io/s/antd-auto-complete-forked-slq2kr?file=/index.js

It works, many thank for you