i18n string dictionaries (#3532)

* TabBar & Settings -> Views i18n enabled

* Proxy i18n

* Settings i18n

* defaultLocale

* Introduce thin Translate wrapper

* PropTypes util caters for multiples

* Translate & LanguageSelector under ui

* Update location & proptypes

* Add UI Language selector

* German settings pages

* Add German language selection

* Corrected umlaut encoding

* Lint

* Re-apply pre-merge conflict changes

* better German i18n

* Language names in locale language

* i8n -> index

* Allow for development/production operation

* Use Yahoo react-intl (as opposed to react-i18nify)

* Use default messages wih expansions

* Remove non-reused variable definitions

* Use FormattedMessage directly, opens up WebPack & Babel opportunities

* Add flat to flatten

* Extract default messages via babel

* Webpack to aggegrate i18n defaultMessage

* Re-add react-intl after merge

* Update proptype references (merge)

* Strip down external dictionary

* i18n for dapps

* Restore tests submodule

* Allow language changes to reflect

* Style updates

js/.babelrc

@@ -13,18 +13,19 @@
   "retainLines": true,
   "env": {
     "production": {
-      "plugins": ["transform-react-remove-prop-types"]
+      "plugins": [
+        "transform-react-remove-prop-types"
+      ]
     },
     "development": {
-      "plugins": ["react-hot-loader/babel"]
+      "plugins": [
+        "react-hot-loader/babel",
+        ["react-intl", { "messagesDir": "./.build/i18n/" }]
+      ]
     },
     "test": {
       "plugins": [
-        [
-          "babel-plugin-webpack-alias", {
-            "config": "webpack/test.js"
-          }
-        ]
+        ["babel-plugin-webpack-alias", { "config": "webpack/test.js" }]
       ]
     }
   }