Issue #1493324 by tim.plunkett, dmsmidt, mgifford, bleen18, davidhernandez, crasx, mparker17, stefan.r, YesCT, joelpittet, tstoeckler, larowlan, vijaycs85, swentel, rpayanm, Bojhan, LewisNyman, emma.maria, BarisW, njbarrett, rteijeiro, nod_, sun, joshtaylor, mrjmd, webchick, marcvangend, kattekrab, SKAUGHT, bowersox, andrewmacpherson, Manjit.Singh, RavindraSingh, Wim Leers, BLadwin, aspilicious, mortendk, mausolos, jessebeach, Gábor Hojtsy, anandps, falcon03, franz, andypost, rooby, rootwork, Cottser, Xano: Inline form errors for accessibility and UX

Issue #2497259 by catch, tim.plunkett, alexpott: system_region_list() unnecessarily translates region names

Issue #2495419 by Cottser: Move the 'search-results' class from the render array and into a Classy template

Issue #2491155 by mikeburrelljr, Mac_Weber, opdavies: Update drupal.org and kernel.org URLs in core modules (Follow-up to 2489912)

Issue #2191115 by cs_shadow, alexrayu, JacobSanford, jhodgdon, Cottser: Clean up stale references to theme('foo') in documentation

Issue #2369987 by aneek, alexpott, joelpittet, rteijeiro, pgautam, jain_deepak, idebr: Remove SafeMarkup::set() from 'head' title on template_preprocess_html

Issue #2339447 by lauriii, joseph.olstad, Fabianx, joelpittet, jcnventura, amateescu, Antti J. Salminen: Improve theme registry build performance by 85%

Revert "Issue #2369987 by aneek, joelpittet, rteijeiro, jain_deepak, pgautam, idebr: Remove SafeMarkup::set() from 'head' title on template_preprocess_html"

This reverts commit 10c8777e.

Issue #2369987 by aneek, joelpittet, rteijeiro, jain_deepak, pgautam, idebr: Remove SafeMarkup::set() from 'head' title on template_preprocess_html

Issue #2449445 by Cottser, emma.maria: Add "indentation" class back to indentation theme hook, use it for styling

Issue #2407565 by epari.siva, davidhernandez, akalata, pakmanlh, lauriii, vedpareek, Cottser, brianperry: Consensus Banana Phase 1, cleanup

Issue #2031641 by aburrows, lauriii, nlisgo, Pol, redsquid, tuutti, LewisNyman, akalata, agviu, kallehauge, _nolocation, rpayanm, saki007ster, mdrummond, RavindraSingh, brahmjeet789: Change active class to is-active

Issue #2226621 by JeroenT, ianthomas_uk, lokapujya, pjonckiere, marcingy, LinL, Xano, rpayanm, piyuesh23: Remove usage of element_info(), element_child() and element_children(). Deprecate element_info_property()

Revert "Issue #2449445 by mortendk, alexpott, Cottser: Add "indentation" class back to indentation theme hook, use it for styling"

Broke table drag. :(

This reverts commit 4fd9ea47.

Issue #2457887 by prateekMehta, stefan.r, rpayanm, alexpott: Use Utility\SafeMarkup class instead of Utility\String for placeholder(), checkPlain(),format() functions

Issue #2452371 by Palashvijay4O: Remove @addtogroup themeable from theme.inc, only theme_indentation() needs it

Issue #2449445 by mortendk, alexpott, Cottser: Add "indentation" class back to indentation theme hook, use it for styling

Issue #2289917 by Wim Leers, mdrummond, lauriii, Manuel Garcia, emma.maria, Scionar, davidhernandez: Convert "messages" page element into blocks

Issue #2433599 by Wim Leers: Ensure every (non-views) pager automatically associates a matching cache context

Issue #2273923 by mpdonadio, pfrenssen, effulgentsia, pcambra, xjm, tim.plunkett, martin107, cilefen: Remove html => TRUE option from l() and link generator

Issue #2407361 by cilefen, JeroenT, hussainweb, neclimdul, ircmaxell, tim.plunkett, nlisgo, Crell: Move usages of drupal_html_id() to Html::getUniqueId()

Revert "Issue #2407361 by JeroenT, cilefen, hussainweb: Move usages of drupal_html_id() to Html::getUniqueId()"

This reverts commit 85b8c837.

Issue #2407361 by JeroenT, cilefen, hussainweb: Move usages of drupal_html_id() to Html::getUniqueId()

Issue #2426595 by mortendk, brahmjeet789, LewisNyman, DickJohnson: rename indentation class to js-indentation

Issue #2388627 by JeroenT, filijonka, ultimateAnkit, tadityar, rpayanm, adci_contributor: Remove usages of drupal_is_front_page

Revert "Issue #2369987 by aneek, joelpittet, idebr, pgautam: Remove SafeMarkup::set() from title on template_preprocess_html"

This reverts commit 45268c11.

Issue #2369987 by aneek, joelpittet, idebr, pgautam: Remove SafeMarkup::set() from title on template_preprocess_html

Issue #2412579 by idebr, geertvd: Tabledrag applies odd/even classes to tables with striping disabled

Issue #2306407 by lauriii, penyaskito, mortendk, pakmanlh, Wim Leers, ypogue: Remove breadcrumb from page template

Issue #2142653 by corbacho, sqndr, LewisNyman, floretan, BarisW, G-raph, JamesLefrère, lokapujya, LoMo, Outi: Change default logo filetype to .svg and add an SVG version of Druplicon

Issue #2368797 by Wim Leers, dawehner, rteijeiro: Optimize ajaxPageState to keep Drupal 8 sites fast on high-latency networks, prevent CSS/JS aggregation from taking down sites and use HTTP GET for AJAX requests

Issue #2404929 by dileepmaurya, segi, Kristen Pol, prajaankit: Path class on <body> may be language specific, results in CSS bugs

Issue #2151469 by rpayanm, lokapujya, JeroenT, alansaviolobo, Richard Damon, pflame, ianthomas_uk: Clean-up usage of deprecated list_themes() and _system_rebuild_theme_data() in favor of theme_handler service.

Issue #2329753 by lauriii, davidhernandez, LewisNyman, nathandao: Move html classes from preprocess to templates