Issue #2459971 by Gábor Hojtsy: The langcode key on configuration files is not explicit in configuration schema

Issue #2457887 by prateekMehta, stefan.r, rpayanm, alexpott: Use Utility\SafeMarkup class instead of Utility\String for placeholder(), checkPlain(),format() functions

Issue #2303765 by davidhernandez, larowlan, mgifford: Make the default 'alt' attribute for Image fields required

Issue #2405469 by yched, googletorp, amateescu, larowlan, Berdir: FileFormatterBase should extend EntityReferenceFormatterBase

Issue #2091337 by genjohnson, no_angel, jhodgdon, ifrik, thijsvdanker, theMusician, amitgoyal: Update hook_help for Image module

Issue #1906264 by mgifford, mitsuroseba, blueminds, johanv, claudiu.cristea, kattekrab, amitgoyal, sivaji@knackforge.com: Required alt tag missing on image alt tag input

Issue #2030633 by hussainweb, Mile23, carsonevans, czigor, Berdir, fernando_calsa, Geijutsuka, amitgoyal, Jānis Bebrītis, undertext: Expand FieldStorageConfig with methods

Issue #2420751 by Wim Leers, mondrake, attiks: ImageEffectBase::transformDimensions() should have a sane default implementation

Issue #2358079 by pwolanin, Berdir: Require a specific placeholder format in db_query() in order to trigger argument expansion, and require explicit 'IN' parameter for conditions

Issue #1728804 by Berdir: Introduce (Content)EntityDeleteForm and children to handle entity deletions

Issue #2364157 by mpdonadio, dawehner, martin107, Berdir, pcambra, naveenvalecha, tim.plunkett: Replace most existing _url calls with Url objects

Issue #2142653 by corbacho, sqndr, LewisNyman, floretan, BarisW, G-raph, JamesLefrère, lokapujya, LoMo, Outi: Change default logo filetype to .svg and add an SVG version of Druplicon

Issue #2350837 by dawehner, Berdir, larowlan, Wim Leers: Convert most usages of EntityInterface::getSystemPath() to use routes

Issue #2396687 by hussainweb: Clean-up image module test members - ensure property definition and use of camelCase naming convention

Issue #2040135 by Wim Leers, Berdir: Caches dependent on simple config are only invalidated on form submissions

Issue #2281645 by dawehner, andypost: Make entity annotations use link templates instead of route names

Issue #2399931 by dawehner, yched: Generic entity api field handler should live in views module not in field module

Revert "Issue #2399931 by dawehner, yched: Generic entity api field handler should live in views module not in field module"

Oops. Wrong patch!

This reverts commit 938051c4.

Issue #2399931 by dawehner, yched: Generic entity api field handler should live in views module not in field module

Issue #2357801 by dawehner, amitgoyal: File field default values are not deployable -- use UUIDs for the default file

Issue #2232477 by plach, yched, tstoeckler, amateescu: Fatal when adding new fields with NOT NULL constraints in a base table that contains existing entities

Issue #2395395 by alexpott, effulgentsia, Gábor Hojtsy: TestBase lacks a config method to be used consistently in tests