Issue #2240021 by BMDan, quartsize: Fixed Improve Installer REQUIREMENT_WARNING Messaging.
Issue #1898422 by joelpittet, lokapujya, Salah Messaoud, stevector, Les Lim, pplantinga, jenlampton, drupalninja99, tlattimore, johannez | c4rl: Language.module - Convert theme_ functions to Twig.