Update Traditional Chinese, HK (zh-HK) translation (#1759)

* Fix missing string in javascript locale (zh-HK)

* Change javascript locale (zh-HK)

* Fix some other strings that were still English.
* Improve `search.status_by`.
* Fix `notification.follow`. ("開始開始你")
* Changes according to user feedback.
  * "Back": "較前顯示" -> "返回"
  * "Home": "家" -> "主頁"

* Update ruby locale (zh-HK)

* Fix missing translation
* Normalize yml
* Update translation strings

config/locales/devise.zh-HK.yml

@@ -57,5 +57,5 @@ zh-HK:
       not_found: 找不到
       not_locked: 並未被鎖定
       not_saved:
-        one: '1 個錯誤令 %{resource} 被法被儲存︰'
+        one: 1 個錯誤令 %{resource} 被法被儲存︰
         other: "%{count} 個錯誤令 %{resource} 被法被儲存︰"