fix: DatePicker's input box is obscured on safari

[justjavac]

🤔 This is a ...

• New feature
• Bug fix
• Site / document update
• Component style update
• TypeScript definition update
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

👻 What's the background?

💡 Solution

The input style defines height and line-height as 32px, and the DatePicker component re-sets height to 20px(by @input-height-sm), but forgot to define line-height.

📝 Changelog

Language	Changelog
🇺🇸 English	🐞 Fix DatePicker's input box is obscured on safari.
🇨🇳 Chinese	🐞 修复 safari 浏览器 DatePicker 组件输入框被遮挡的问题。

☑️ Self Check before Merge

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

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[buildsize]

File name	Previous Size	New Size	Change
package-lock.json	833.41 KB	858.1 KB	24.69 KB (3%)

[codecov]

Codecov Report

Merging #17421 into master will decrease coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #17421      +/-   ##
==========================================
- Coverage   96.03%   95.95%   -0.08%     
==========================================
  Files         267      263       -4     
  Lines        7416     7351      -65     
  Branches     2055     2053       -2     
==========================================
- Hits         7122     7054      -68     
- Misses        292      295       +3     
  Partials        2        2

Impacted Files	Coverage Δ
components/form/FormItem.tsx	97.15% <0%> (-1.71%)	⬇️
components/descriptions/index.tsx	98.66% <0%> (-0.27%)	⬇️
components/tooltip/index.tsx	96.47% <0%> (-0.05%)	⬇️
components/upload/UploadList.tsx	96.51% <0%> (-0.05%)	⬇️
components/switch/index.tsx	100% <0%> (ø)	⬆️
components/popconfirm/index.tsx	100% <0%> (ø)	⬆️
components/tree/Tree.tsx	96.87% <0%> (ø)	⬆️
components/progress/Circle.tsx	100% <0%> (ø)	⬆️
components/checkbox/Group.tsx	100% <0%> (ø)	⬆️
components/result/noFound.tsx
... and 4 more

---

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Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 6429172...f78fc1c. Read the comment docs.

[codecov]

Codecov Report

Merging #17421 into master will decrease coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #17421      +/-   ##
==========================================
- Coverage   96.03%   95.95%   -0.08%     
==========================================
  Files         267      263       -4     
  Lines        7416     7351      -65     
  Branches     2055     2053       -2     
==========================================
- Hits         7122     7054      -68     
- Misses        292      295       +3     
  Partials        2        2

Impacted Files	Coverage Δ
components/form/FormItem.tsx	97.15% <0%> (-1.71%)	⬇️
components/descriptions/index.tsx	98.66% <0%> (-0.27%)	⬇️
components/tooltip/index.tsx	96.47% <0%> (-0.05%)	⬇️
components/upload/UploadList.tsx	96.51% <0%> (-0.05%)	⬇️
components/switch/index.tsx	100% <0%> (ø)	⬆️
components/popconfirm/index.tsx	100% <0%> (ø)	⬆️
components/tree/Tree.tsx	96.87% <0%> (ø)	⬆️
components/progress/Circle.tsx	100% <0%> (ø)	⬆️
components/checkbox/Group.tsx	100% <0%> (ø)	⬆️
components/result/noFound.tsx
... and 4 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 6429172...f78fc1c. Read the comment docs.