am 015d616a: docs: use devsite hdf bool as a javascript condition for managing the lang toggle. sync the sdk and ds templates so we can move toward one template set

# Via Scott Main
* commit '015d616af8cf72cf609b19257604e520a70c3286':
  docs: use devsite hdf bool as a javascript condition for managing the lang toggle. sync the sdk and ds templates so we can move toward one template set