Issue #1849822 by dawehner: Convert (HTML) view rendering to a render array.
Issue #2273825 by rpayanm, dawehner: Fixed UserStorageInterface should extend EntityStorageInterface.
Issue #2070737 by herom, EllaTheHarpy, alexpott: Change values of LanguageInterface::DIRECTION_(LTR/RTL) to ('ltr'/'rtl').