Store texts data in the element using them

This way we can have a generic function we can apply in other places.

app/assets/javascripts/globalize.js

@@ -75,11 +75,9 @@
       App.Globalize.display_translations(locale);
     },
     update_description: function() {
-      var count, description;
+      var count;
       count = App.Globalize.enabled_locales().length;
-      description = App.I18n.pluralize($(".globalize-languages").data("languages-description"), count);
-
-      $(".js-languages-description").text(description);
+      App.I18n.set_pluralize($(".js-languages-description"), count);
     },
     initialize: function() {
       $(".js-add-language").on("change", function() {

app/assets/javascripts/i18n.js

@@ -1,6 +1,9 @@
 (function() {
   "use strict";
   App.I18n = {
+    set_pluralize: function(element, count) {
+      element.text(this.pluralize(element.data("texts"), count));
+    },
     pluralize: function(texts, count) {
       return this.raw_text(texts, count).replace("%{count}", count);
     },