fix 10445

[jljsj33]

1. 修复 float 布局错位
   

2. 动画时间用 0.3。 跟输入框时间同步。。。

3. 强制修改 state.helpShow 来决定显示的状态，，避逸流氓输入 bug Form表单项校验位置高度出现抖动 #10445

[codecov]

Codecov Report

Merging #10457 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #10457      +/-   ##
==========================================
+ Coverage   86.47%   86.48%   +<.01%     
==========================================
  Files         196      196              
  Lines        4792     4795       +3     
  Branches     1338     1339       +1     
==========================================
+ Hits         4144     4147       +3     
  Misses        645      645              
  Partials        3        3

Impacted Files	Coverage Δ
components/form/FormItem.tsx	97.87% <100%> (+0.04%)	⬆️

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[ant-design-bot]

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[ant-design-bot]

Deploy preview for ant-design ready!

Built with commit 57febfe

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[jljsj33]

想明白了，，吗的。。。false -> true -> false -> true 时，，元素从第一个 true 时就一直存在的。。。animate 里是等 end 后切状态。。。所以在第二个 false 时值还是 true 的。。 。 在 children 里判断 true 是为了在第二个 false 这时避免掉换样式。。。你那样的写法第二个 false 在开始时给值了。。。第二个 false 应该在动画结束给值

[mzohaibqc]

@jljsj33 Can you kindly fix this typo in Themining -> Theming in last line in following files
https://github.com/ant-design/ant-design/blob/master/docs/react/customize-theme.en-US.md
https://github.com/ant-design/ant-design/blob/master/docs/react/customize-theme.zh-CN.md

Thanks

[jljsj33]

再理一下。。。
false -> true -> false -> true

false	true	false	true
24	5	24	5	抖动问题判断第二个 false ，元素并未删除
24	5	5	5	正确

这时的不显示其实还是处理显示的状态。。。

显示状态不需要等动画结束去改状态，，一开始就需要更换

[jljsj33]

@mzohaibqc thx, you can also direct pr

[jljsj33]

@mzohaibqc fix

[jljsj33]

@afc163 这样写 state.helpShow 其实一点用都没了。。。你再重构吧，，，反正问题在上面了，，,