* Translated the md files of Login component and the validation messages.

* Rename index.md to index.en-US.md

* Restored the Chinese version and renamed it

* Updated according to review

* Fixed all the typos

Fix typo Themeing->Theming

* fix Authorized Promise render

* fix style Authorized blank line

原代码错用 location 变量作为判断，会一直读取 window.location

🔥 Clean up unused code

* div to fragment

* Remove extra divs

* fix indent

* translate FooterToolbar

* remove the unnessary demo code

* let request.js be able to deal with FormData

* Update request.js

* Update request.js

* Update request.js

* Update request.js

* remove comma

* add period in the end for the tip which don't has before

* 让保存  取消 按钮有点击的机会

* Update TableForm.js

delete

* Slider breakpoint: md => lg

* breadcrumb separator custom

- extract columns
- support multiple sums display