[bugfix] Search: trigger blur after click search button

[snowtreetree]

[bug fix]Search: 使用px2rem，Search问题内容向上偏移。
[new feature]Search: 点击确定，键盘不能收起。

[codecov-io]

Codecov Report

Merging #1448 into dev will decrease coverage by 0.21%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##              dev    #1448      +/-   ##
==========================================
- Coverage   84.58%   84.36%   -0.22%     
==========================================
  Files          96       96              
  Lines        1492     1503      +11     
  Branches      296      302       +6     
==========================================
+ Hits         1262     1268       +6     
- Misses        209      212       +3     
- Partials       21       23       +2

Impacted Files	Coverage Δ
packages/field/index.vue	94.59% <100%> (+0.3%)	⬆️
packages/radio/index.vue	42.85% <0%> (-7.15%)	⬇️
packages/button/index.vue	66.66% <0%> (ø)	⬆️

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[snowtreetree]

CI有个报错，不知道什么原因，但是通过了。😂。

[chenjiahan]

可以截图解释一下 『点击确定，键盘不能收起』是在什么场景下吗

[snowtreetree]

感觉点击搜索之后，键盘收起的体验会比较好一点。