Tabs - Tabs组件在右侧有Input时 焦点在input上 使用键盘左右键 移动的是Tabs

[Vicky-w]

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

Reproduction link

https://codepen.io/anon/pen/VRgXQK?&editable=true&editors=001

Steps to reproduce

1.点击鼠标在input上
2.在input内输入些内容
2.按鼠标左右键

What is expected?

焦点在input文字间移动

What is actually happening?

焦点在tab间移动

Environment	Info
antd	3.15.2
React	react
System	All
Browser	All

[afc163]

https://codepen.io/anon/pen/draKbq?&editable=true&editors=001

https://codesandbox.io/s/jiben-antd4167-forked-291qv