Issue #1939062 by steveoliver, mdrummond, jenlampton, hussainweb, Cottser, joelpittet, jerdavis, ekl1773, dale42, drupalninja99, gabesullice, c4rl: Convert theme_item_list() to Twig.

Issue #2177655 by chakrapani, InternetDevels, martin107 | jessebeach: Replace theme() with drupal_render() in install.core.inc.

Issue #2007124 by pplantinga, anirudha_3083, martin107, InternetDevels: Replace theme() with drupal_render() in authorize.php.

Issue #1891126 by TR, YesCT, mitron: Extend / Modules page disabled red signal concerned usability participants.

Issue #2176105 followup by sun: Installer catches exceptions and manually re-prints them; does not use error/exception handler.

Issue #2171269 by effulgentsia, Wim Leers, InternetDevels, snig: Handle block rendering's #attributes correctly (fixes in-place editing of custom blocks).

Issue #2177653 by jessebeach, joelpittet, InternetDevels: Replace theme() with drupal_render() in form.inc.

Issue #2160575 by agentrickard, amateescu, plopesc: Option widgets integration is broken for the entity reference field.

Issue #2181289 by mradcliffe: Prevent exceptions on missing cache table during cache clear for pgsql.

Issue #2181855 by Cottser: Don't let ViewTestBase hog the useful assertBlockAppears and assertNoBlockAppears methods.

Issue #2185831 by tim.plunkett: Split up ParamConverterManager and stop throwing NotFoundHttpException.

Issue #2152229 by steveoliver, rteijeiro, joelpittet, JeroenT, InternetDevels, michamilz, burgerboydaddy, hussainweb, shanethehat, jenlampton, kpa, AnythonyR, EVIIILJ, kgoel, Cottser, dsdeiz, hanpersand: Convert theme_textarea() to Twig

Issue #2181283 by mradcliffe: Prevent pgsql driver from trying to implode primary key fields that are defined by an array.

Issue #1857336 by Xano, swentel, Berdir, InternetDevels: Use entity variable in $build for taxonomy_term entity.

Issue #2152213 by steveoliver, joelpittet, hussainweb, shanethehat, jenlampton, kpa, AnythonyR, EVIIILJ, kgoel, Cottser, dsdeiz, hanpersand: Convert theme_form_element() to Twig

Issue #1987606 by vijaycs85, mparker17, InternetDevels, rdickert: Convert ajax_test_dialog() to a new style controller.