Issue #2335879 by alexpott, dixon_, Wim Leers, chx, mauzeh, ygerasimov, jeqq: Change SqlContentEntityStorageSchema::requiresEntityDataMigration() to ask the old storage handler if it has data rather than assuming yes unless NULL storage

Issue #2388707 by damiankloip: UserAccessControlHandler has wrong $explicit_check_fields name for the password field when checking field access

Issue #2355909 by penyaskito, alexpott, Gábor Hojtsy, DuaelFr: language.settings config is not scalable

Issue #2263359 by jhodgdon: hook_help(): Top of page help sections can't link to help pages without a fatal error or checking for help module

Issue #2084987 by andypost, Jalandhar: Remove usage of field_ui_default_value and recommend proper replacement

Issue #2380607 by Berdir, dawehner: Do not call ConfigBase::validateKeys() for data loaded from storage

Issue #2387443 by alexpott, dawehner: BinaryFileResponse can fail because the core MIME guessing is not added to the MimeType singleton

Issue #2364381 by Wim Leers: Exception thrown in drupal_render() causes an exception during the rendering of exceptions

Issue #2383573 by tibbsa: Clean-up Contact module Test members - ensure property definition and use of camelCase naming convention

Issue #2331793 by olli, Gábor Hojtsy: Changing pager settings for this display only also changes pager settings for other display

Issue #2347999 by Mile23, daffie, cs_shadow, cosmicdreams: DrupalUnitTestBase is deprecated, replace with KernelTestBase

Issue #2384487 by rpayanm, daffie, Sharique, areke: Make the class variables protected for FilterFormat

Issue #2385225 by tibbsa: Clean-up editor module test members - ensure property definition and use of camelCase naming convention

Issue #2381303 by tibbsa, rpayanm, hussainweb, mglaman: Clean-up CKEditor module test members — ensure property definition and use of camelCase naming convention

Issue #1055150 by rootwork, Devin Carlson, yoroy, brianV, JimmyAx: Time zone description is confusing on user register form

Issue #2365319 by damiankloip, larowlan: Entity normalization should check field access to avoid leaking data

Issue #2386325 by Gábor Hojtsy: Recurring config schema problems with datetime and link field values in migrate tests

Issue #2385227 by tibbsa: Clean-up entity_reference module test members - ensure property definition and use of camelCase naming convention