Issue #2203835 by longwave: Make default form display and display mode be first secondary tabs.
Issue #2099421 by larowlan: Add an administrative description for a comment field.
Issue #558362 by aaronott, swentel, Jamesap, scor, Letharion, mtift, Dave.Ingram: Add test coverage for Field API Number.
Issue #850728 followup by LewisNyman Bartik: template.php cleanups.
Issue #2077599 by chx, olli: Xss Split argument passing needs to come out of stone age.
Issue #2170289 by plopesc, InternetDevels: Entity Display modes form allows to create machine names including dots.
Issue #2163203 by joelpittet, longwave, saki007ster: Remove calls to deprecated global $user wherever possible (outside bootstrap and authentication).
Issue #2004336 by damiankloip: Default UUID key in ConfigEntityType.
Issue #1490402 followup by sun: Redesign tabs and the content header.
Issue #2213357 by sun: Use a proper kernel in early installer.
Issue #2204635 by Berdir: Convert ViewsHandlerManager to DefaultPluginManager.
Issue #2203407 by nod_, sun: Replace #attached library array values with provider-namespaced strings.
Issue #2201659 by ocsilalala, larowlan | andypost: Fix serialization of the forum manager and dependency on current_user service.
Issue #2207631 by anksy, andrei.dincu: Primary button's border is not visible on focus.
Issue #2204621 by Berdir: Convert InPlaceEditorManager to DefaultPluginManager.
Issue #2206687 by damiankloip: Replace user_authenticate with a UserAuth service.
Issue #2171315 by sun, Xano, diarmy, tim.plunkett: Ensure a NULL container in UnitTestCase::setUp().
Issue #2204345 by tim.plunkett: Adjust PluginBag's instance handling methods.
Issue #1774104 by sun: Replace all trivial drupal_write_record() calls with db_merge().
Issue #2205799 by cam8001, davidgrayston: PHPUnit should be configured to work consistently on all environments.