Add Traditional Chinese, Hong Kong translation (zh-HK) (#1544)

* Added Chinese Traditional Hong Kong (zh-HK) for Ruby

* Added translations for Ruby.

* Added Chinese Traditional Hong Kong (zh-HK) for JS

* Added translations for javascript code.

* Rearrange language references in mastodon.jsx

* Break `addLocaleData` into multiple lines. Make future commit more readable.
* Roughly re-sort the languages in alphabetical orders
  (only manually put English on top because it is default).

* Sort application.rb locale with alphabetical order

With exception that English (default language) goes first.
Improve code readability.

* Resort language selection box alphabetically

Sort HUMAN_LOCALES in the alphabetical order of display name
(except English, the default language, come first).

Improve usability.

1 files changed, 3 insertions, 2 deletions

diff --git a/app/assets/javascripts/components/locales/index.jsx b/app/assets/javascripts/components/locales/index.jsx
index da85240b7..c3c5784ab 100644
--- a/app/assets/javascripts/components/locales/index.jsx
+++ b/app/assets/javascripts/components/locales/index.jsx
@@ -9,6 +9,7 @@ import fi from './fi';
 import eo from './eo';
 import ru from './ru';
 import ja from './ja';
+import zh_hk from './zh-hk';
 
 
 const locales = {
@@ -22,8 +23,8 @@ const locales = {
   fi,
   eo,
   ru,
-  ja
-
+  ja,
+  'zh-HK': zh_hk,
 };
 
 export default function getMessagesForLocale (locale) {