Issue #2010982 by somepal, andypost, pplantinga | Samvel: Replace theme() with drupal_render() in system module for system_status().

Issue #2058257 by effulgentsia: Fix ConfigFieldItemInterface's method signatures to typehint interfaces instead of classes.

Issue #2009574 by e2tha_e, adamcowboy, Samvel, jenlampton: Replace theme() with drupal_render() in forum module.

Issue #1933426 follow-up by dawehner: Fixed documentation around drupal_add_js -> drupal_add_library change.

Issue #2008970 by markie, StephaneQ, adamcowboy | thedavidmeister: Replace theme() with drupal_render() in aggregator module.

Issue #2003260 by ebeyrent, DmitryDrozdik, kgoel: Replace drupal_container() with Drupal::service() in the breakpoint module.

Issue #1815886 follow-up by slashrsm: Upgrade path for Drupal core cannot manage files larger than 4 GB

Issue #2031529 by Wim Leers, oadaeh: Fixed JavaScript error when submitting a form that has a text_format() selector set to a text format without associated text editor.

Issue #2026089 by Manuel Garcia: Change the documentation page link in content_translation() module.

Issue #2058435 by David_Rothstein: Fixed Drupal 8 lost support for the 'tel' protocol in URL filtering functions.

Issue #2049159 by amateescu, Crell: Create a ControllerBase class to stop the boilerplate code madness.

This reverts commit 8ce27f22.

Issue #2011578 by mortendk, tlattimore, Cottser, soulston: Markup for Stark's page.html.twig + maintenance-page.html.twig.

Issue #2028499 by tsphethean, damiankloip, dawehner: Drupal_sort_weight() should be converted to a class.

Issue #2006560 by dawehner, jhodgdon: Fixed The boolean string filter doesn't result in correct where clause.

Issue #2056991 by alexpott: Use getFieldSetting() instead of getDefinition()->getFieldSetting() in LinkItem.

Issue #2042285 by thedavidmeister, jenlampton, Mark Carver: #theme_wrappers() should be able to have a unique set of variables per wrapper hook.

Issue #2045043 by bechtold, vijaycs85, YesCT, Gábor Hojtsy: Fixed Field listings operations cannot be altered.

Issue #2009014 follow-up by StephaneQ: Replace one more theme() with drupal_render() in file module.

Revert "Issue #2009014 follow-up by StephaneQ: Replace one more theme() with drupal_render() in file module."

This reverts commit f4aead78.

Issue #2010126 follow-up by Eric_A: Replace theme() with drupal_render() in image module for theme_image_formatter().

Issue #2056895 by tim.plunkett, xjm: Fixed Routes with optional placeholders can fatal when placed in a menu.

Issue #2027131 by drupalrv: Block type operations should be listed in the same order as Content type operations.

Issue #2009014 follow-up by StephaneQ: Replace one more theme() with drupal_render() in file module.

Issue #2009018 follow-up by StephaneQ: One more replace theme() with drupal_render() in filter module.