intl: Translate intl/js/tvheadend.js.pot in en_US

84% of minimum 80% translated source file: 'intl/js/tvheadend.js.pot'
on 'en_US'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

Author: transifex-integration[bot]