Locales helper improvement

Added a rescue block in `name_for_locale()` to ensure the application doesn't crash in case it receives an invalid locale.

app/helpers/locales_helper.rb

@@ -3,6 +3,8 @@ module LocalesHelper
   def name_for_locale(locale)
     default = I18n.t("locale", locale: locale)
     I18n.backend.translate(locale, "i18n.language.name", default: default)
+  rescue
+    nil
   end
 
 end

app/views/admin/site_customization/pages/index.html.erb

@@ -28,7 +28,7 @@
         <td><%= I18n.l page.created_at, format: :short %></td>
         <td><%= I18n.l page.created_at, format: :short %></td>
         <td><%= t("admin.site_customization.pages.page.status_#{page.status}") %></td>
-        <td><%= name_for_locale(page.locale) rescue nil %></td>
+        <td><%= name_for_locale(page.locale) %></td>
         <td class="small">
           <span class="icon-eye"></span>
           <% if page.status == "published" %>