Update to latest upstream i18n-js

The issues we had before seem to be fixed now, so drop our
custom version and go back to the upstream one with some minor
monkey patching tweaks.

This also fixes the sprockets dependencies to correctly rebuild
the javascript when the translations change.

Gemfile

@@ -50,7 +50,7 @@ gem "composite_primary_keys", "~> 8.1.0"
 gem "http_accept_language", "~> 2.0.0"
 gem "paperclip", "~> 4.0"
 gem "deadlock_retry", ">= 1.2.0"
-gem "openstreetmap-i18n-js", ">= 3.0.0.rc5.3", :require => "i18n-js"
+gem "i18n-js", ">= 3.0.0.rc10"
 gem "rack-cors"
 gem "actionpack-page_caching"
 

Gemfile.lock

@@ -96,6 +96,8 @@ GEM
     http_accept_language (2.0.5)
     httpclient (2.6.0.1)
     i18n (0.7.0)
+    i18n-js (3.0.0.rc10)
+      i18n (~> 0.6)
     jquery-rails (4.0.3)
       rails-dom-testing (~> 1.0)
       railties (>= 4.2.0)
@@ -128,7 +130,7 @@ GEM
     mime-types (2.6.1)
     mini_portile (0.6.2)
     minitest (5.7.0)
-    multi_json (1.11.0)
+    multi_json (1.11.1)
     multi_xml (0.5.5)
     multipart-post (2.0.0)
     netrc (0.10.3)
@@ -162,8 +164,6 @@ GEM
     omniauth-windowslive (0.0.9)
       multi_json (>= 1.0.3)
       omniauth-oauth2 (~> 1.0)
-    openstreetmap-i18n-js (3.0.0.rc5.3)
-      i18n
     openstreetmap-omniauth-google-oauth2 (0.2.6.1)
       jwt (~> 1.0)
       multi_json (~> 1.3)
@@ -221,7 +221,7 @@ GEM
       thor (>= 0.18.1, < 2.0)
     rainbow (2.0.0)
     rake (10.4.2)
-    redcarpet (3.3.0)
+    redcarpet (3.3.1)
     ref (1.0.5)
     rest-client (1.8.0)
       http-cookie (>= 1.0.2, < 2.0)
@@ -307,6 +307,7 @@ DEPENDENCIES
   htmlentities
   http_accept_language (~> 2.0.0)
   httpclient
+  i18n-js (>= 3.0.0.rc10)
   jquery-rails
   jshint
   json
@@ -320,7 +321,6 @@ DEPENDENCIES
   omniauth-facebook
   omniauth-openid
   omniauth-windowslive
-  openstreetmap-i18n-js (>= 3.0.0.rc5.3)
   openstreetmap-omniauth-google-oauth2 (>= 0.2.6.1)
   paperclip (~> 4.0)
   pg

config/initializers/i18n.rb

@@ -11,28 +11,14 @@ module I18n
   end
 
   module JS
-    class << self
-      def make_ordered(unordered)
-        ordered = ActiveSupport::OrderedHash.new
-
-        unordered.keys.sort { |a, b| a.to_s <=> b.to_s }.each do |key|
-          value = unordered[key]
-
-          if value.is_a?(Hash)
-            ordered[key] = make_ordered(value)
-          else
-            ordered[key] = value
+    class FallbackLocales
+      def default_fallbacks_with_validation
+        default_fallbacks_without_validation.select do |locale|
+          ::I18n.available_locales.include?(locale)
         end
       end
 
-        ordered
-      end
-
-      def filtered_translations_with_order
-        make_ordered(filtered_translations_without_order)
-      end
-
-      alias_method_chain :filtered_translations, :order
+      alias_method_chain :default_fallbacks, :validation
     end
   end
 end