Issue #2353011 by arpitr: Remove deprecated function views_get_all_views.
Issue #2313883 by alexpott: Fixed Minor code flow improvements to SessionHandler::write().
Issue #2350571 by mitrpaka: Replace extend of deprecated DrupalUnitTestBase with KernelTestBase in Field.
Issue #1802128 by legolasbo, jucallme: Fixed Replace "user name" with "username" in UI text.
Issue #2353393 by tstoeckler: Use LanguageInterface::DIRECTION_LTR instead of 'ltr' directly.
Issue #2353005 by arpitr: Remove deprecated function views_get_enabled_display_extenders.
Issue #2352857 by thamas: Fixed Improve the display of trigger icon (pencil).
Issue #2246675 by rpayanm, johnstorey, holly.ross.drupal | mgbellaire: Remove all unnecessary 'template' lines in hook_theme() declarations.
Issue #2353347 by zaporylie, dawehner: Fixed Random failure in DisplayPathTest.
Issue #2350997 by SchnWalter: Fixed Help module install error when Taxonomy is disabled because of Field UI.
Issue #2331113 by David_Rothstein: Fixed Node access rebuilds are completely broken when being rebuilt through a batch process?.
Issue #2350877 by dawehner, Wim Leers, hussainweb: Deprecate/rename drupal_add_feed(), drupal_add_html_head(), drupal_add_html_head_link(), drupal_add_http_header(), and allow to be set declaratively in #attached.
Issue #2341385 by damiankloip: Fixed No alter hooks are invoked for views handler plugin definitions.
Issue #1972300 by znerol, chx, dawehner: Write a more scalable dispatcher.
Issue #2330899 by attiks, Jelle_S, fietserwin: Allow image effects to change the MIME type + extension, add a convert image effect.
Issue #2298821 by LewisNyman: Move generic layout styling into system.admin.css.
Revert "Issue #2352857 by thamas: Fixed Improve the display of trigger icon (pencil)."

Needs more discussion.

This reverts commit b983fad1585b19378ed39b5fc4ccc40779bac733.
Issue #998898 by stefan.r, mradcliffe, Damien Tournoud, bzrudi71, Josh Waihi, chalet16, Stevel, chx: Fixed Make sure that the identifiers are not more the 63 characters on PostgreSQL.
Issue #2346027 by sqndr, ckrina, geodaniel: Fixed Unpublished content background overlaps tabs.
Issue #2352361 by ultimike: MigrateFieldTest @file docblock is wrong.