Fix broken embed page (#3577)

app/views/layouts/embedded.html.haml

@@ -3,6 +3,8 @@
   %head
     %meta{ charset: 'utf-8' }/
     = stylesheet_pack_tag 'application', media: 'all'
+    = javascript_pack_tag 'common', integrity: true, crossorigin: 'anonymous'
+    = javascript_pack_tag "locale_#{I18n.locale}", integrity: true, crossorigin: 'anonymous'
     = javascript_pack_tag 'public', integrity: true, crossorigin: 'anonymous'
   %body.embed
     = yield