Issue #2428377 by sun, daffie, amateescu: SQLite Schema class is missing use Drupal\Component\Utility\Unicode

This reverts commit d1a9a099.

Issue #2425691 by pjbaert, kepford, drupalninja99: Remove .leaf/.menu-item--leaf from menu CSS components

Issue #2426031 by almaudoh, cpj: Remove deprecated uses of SessionManager::isEnabled(), SessionManager::enable() and SessionManager::disable()

Issue #1946090 by pjonckiere, alex-mo, rpayanm: _drupal_wrap_mail_line() does not force-wrap too long words after 996 characters

Issue #2420107 by alexpott: Determine which config entities can be fixed and which will be deleted when a dependency is removed

Issue #2383413 by larsmw, Cottser, alvar0hurtad0: Remove file_exists() when registering namespaces for Twig template paths

Issue #2318437 by Wim Leers, Gábor Hojtsy, geertvd: Replace the hardcoded langcode key on blocks with the 'language' cache context

Issue #2425759 by andypost, jhodgdon: SearchQuery lacks preExecute(), making countQuery() run even when there are problems in prepare step

Issue #2343127 by tadityar, harshil.maradiya, aphickey, bburg, ashutoshmishra: Docblock fixes for core/lib/Drupal/Core/Database/Query

Issue #2423579 by mpdonadio, xjm, heilop, Wim Leers, webchick: Url::fromUrl('user-path:/') should throw an exception when a path component without a slash is given

Issue #2229145 by znerol, neclimdul, larowlan, alexpott, joelpittet, almaudoh, tadityar: Register symfony session components in the DIC and inject the session service into the request object

Issue #2338559 by larowlan, damiankloip, hampercm, mradcliffe, jibran, Berdir, Fabianx, catch: Never serialize password fields by default

Issue #2409515 by joelpittet: Updater::findInfoFile() was never updated for .info -> .info.yml change.

Wrong commit message.

This reverts commit 96b7b02e.

Issue #2414255 by lauriii, Jeff Burnz, dawehner, davidhernandez: Subtheme template inheritance working in reverse order

Issue #2419065 by jhedstrom: Switching the entity storage class should not be considered a definition update that requires schema changes

Issue #2051467 by jhedstrom, dawehner, amateescu, Berdir, herom, Mile23: Expand and convert to phpunit tests for \Drupal\Component\Transliteration

Issue #2338727 by znerol, almaudoh: Replace static SessionManager::$enabled property with WriteSafeSessionHandler class and resolve hidden circular dependency between SessionManager and SessionHandler