Issue #1987424 by rteijeiro, oshelach, a-fro, JeroenT, joelpittet, Cottser, IshaDakota, InternetDevels, TommyK, Sutharsan, robmc, mark.labrecque, lokapujya, Gaelan, drupalninja99, Carolyn, jenlampton, longwave: Seven.theme - Convert theme_ functions to Twig.

Issue #2009654 by Cottser, InternetDevels, jesse.d, Carolyn, jenlampton: Replace theme() with drupal_render() in locale module.