Highlight current locale when changing locale from select

When the locale changes the corresponding tab is
highlighted automatically.
When a language is added to the milestone, the tab
is highlighted automatically.

app/assets/javascripts/globalize.js.coffee

@@ -4,6 +4,7 @@ App.Globalize =
     $(".js-globalize-locale-link").each ->
       if $(this).data("locale") == locale
         $(this).show()
+        App.Globalize.highlight_locale($(this))
       $(".js-globalize-locale option:selected").removeAttr("selected");
       return
 

app/helpers/globalize_helper.rb

@@ -30,6 +30,10 @@ module GlobalizeHelper
     globalize_locale == locale ? "highlight" : ""
   end
 
+  def highlight_current?(locale)
+    I18n.locale == locale ? 'highlight' : ''
+  end
+
   def show_delete?(locale)
     I18n.locale == locale ? '' : 'display: none'
   end

app/views/budgets/investments/milestones/_globalize_locales.html.erb

@@ -2,7 +2,7 @@
   <span>
     <%= link_to name_for_locale(locale), "#",
                 style: css_to_display_translation?(@milestone, locale),
-                class: "js-globalize-locale-link",
+                class: "js-globalize-locale-link #{highlight_current?(locale)}",
                 data: { locale: locale },
                 remote: true %>
     <%= link_to t("admin.milestones.form.remove_language"), "#",