Updating Chinese (Simplified) translations (#5643)

* i18n: (zh-CN) Bug fix for note-counter.

* i18n: (zh-CN) Improve translations

* i18n: (zh-CN) Improve translations

* i18n: (zh-CN) Add missing translations

* i18n: (zh-CN) Improve translations

* i18n: (zh-CN) Add support.array key for better wording

* Revert "i18n: (zh-CN) Add support.array key for better wording"

This reverts commit 27bf9a946e886213e827cd985d4f62419db57534.
Looks like this commit can't get pass the checks, revert it for now.

* i18n: (zh-CN) Change `客户端` to `应用`

* i18n: (zh-CN) Improve translations

* i18n: (zh-CN) Add missing translations (#5635)

* i18n: (zh-CN) Change `两步验证` to `双重认证`

* i18n: (zh-CN) Improve translations