Issue #2349819 by amateescu, swentel, Leksat, larowlan, dawehner, Gábor Hojtsy, mpdonadio, benjy, jmuzz, yched, jibran, marthinal, dmsmidt: String field type doesn't consider empty string as empty value

Issue #2501931 by alexpott, alimac, cmanalansan, davidhernandez, scotself, cilefen, RavindraSingh, peezy, YesCT, pwolanin: Remove SafeMarkup::set in twig_render_template() and ThemeManager and FieldPluginBase:advancedRender

Revert "Issue #2501931 by alexpott, alimac, cmanalansan, davidhernandez, scotself, cilefen, RavindraSingh, peezy, YesCT, pwolanin: Remove SafeMarkup::set in twig_render_template() and ThemeManager and FieldPluginBase:advancedRender"

This reverts commit 9ccb44e2.

Issue #2501931 by alexpott, alimac, cmanalansan, davidhernandez, scotself, cilefen, RavindraSingh, peezy, YesCT, pwolanin: Remove SafeMarkup::set in twig_render_template() and ThemeManager and FieldPluginBase:advancedRender

Issue #2450993 by Wim Leers, Fabianx, Crell, dawehner, effulgentsia: Rendered Cache Metadata created during the main controller request gets lost

Issue #1867518 by plach, dawehner, yched, iMiksu, epari.siva, marcvangend, Fabianx, Wim Leers, effulgentsia: Leverage entityDisplay to provide fast rendering for fields

Issue #2454145 by kgoel, dawehner, adamwhite, rteijeiro, wwhurley: Replace user_name handler with Field API formatter

Issue #2133471 by lokapujya, Lendude, jhedstrom, tadityar, webflo, whitelikeman: Notice: Undefined index: uid in simple a user view

Issue #2395395 by alexpott, effulgentsia, Gábor Hojtsy: TestBase lacks a config method to be used consistently in tests

Issue #2221433 by damiankloip, dawehner: Clean up views rendering. Move stuff from template_preprocess_views_view(), into a #pre_render callback.

Issue #1498664 by andypost, plach, penyaskito | dawehner: Refactor user entity properties to multilingual.

Issue #697760 by sun: Replace getInfo() in tests with native phpDoc + annotations (following PHPUnit).

Issue #2073531 by tim.plunkett, dawehner, Berdir, catch, plach: Use current user service instead of _account, remove _account from the request object.

Issue #2002348 by baldwinlouie, heddn, sillygwailo: Rename Views method advanced_render() to advancedRender().