Issue #2416409 by alexpott, bojanz: Delete dependent config entities that don't implement onDependencyRemoval() when a config entity is deleted

Issue #2298687 by tstoeckler, Jose Reyero, hussainweb, rpayanm: Sequence and Mapping implement interfaces incorrectly, make them honest about what they support

Revert "Issue #2298687 by tstoeckler, Jose Reyero, hussainweb, rpayanm: Sequence and Mapping implement interfaces incorrectly, make them honest about what they support"

This reverts commit 43370336.

Issue #2298687 by tstoeckler, Jose Reyero, hussainweb, rpayanm: Sequence and Mapping implement interfaces incorrectly, make them honest about what they support

Issue #2388867 by alexpott, xjm, jhodgdon: Notifying user of config changes when config has never been synched makes no sense

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

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

Issue #2414991 by alexpott: Prevent hook_config_schema_info_alter from adding or removing definitions

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

Issue #2406543 by alexpott: Remove ConfigFactory::setOverrideState and ConfigFactory::getOverrideState()

Issue #2225427 by ianthomas_uk, martin107, JeroenT, LoMo: Remove remaining uses of deprecated language functions (mostly in object oriented code)

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

Issue #2140511 by alexpott, Gábor Hojtsy, swentel, babruix, ohthehugemanatee, jessebeach, Berdir: Configuration file name collisions silently ignored for default configuration

Issue #2392319 by alexpott, effulgentsia: Config objects (but not config entities) should by default be immutable

Issue #2136559 by Gábor Hojtsy: Config entity admin lists show configuration with overrides (eg. localized)

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

Issue #2377117 by mglaman, rpayanm, pcambra: Replace all instances of entity_load('field_storage_config') and entity_load_multiple('field_storage_config') with static method calls

Issue #2384481 by rpayanm, daffie, tadityar, hussainweb, areke, claudiu.cristea: Make the class variables protected for NodeType

Issue #2309737 by rpayanm, hussainweb, max-kuzomko, herom, millerbennett, ianthomas_uk, quietone, Sutharsan, sumitmadan, toddmbloom: Remove deprecated format_plural usage

Issue #2381753 by tadityar, tibbsa, Mile23, cilefen: Clean-up Config module test members - ensure property definition and use of camelCase naming convention

Issue #2382195 by tibbsa, subhojit777, tadityar, cilefen, Mile23: Clean-up simpletest module test members - ensure property definition and use of camelCase naming convention

Issue #1719648 by joachim, ttkaminski, kshama_deshmukh: ModuleInstaller::install() silently fails if a module isn't in the file system

Issue #2264755 by mtift, adci_contributor: Clarify description of Drupal\config\Tests\ConfigImportAllTest

Issue #2392351 by alexpott, swentel: When an entity bundle config gets deleted, entities of that bundle break

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

Issue #2375673 by DickJohnson, LewisNyman, lauriii, emma.maria, sqndr, Wim Leers, stephr: Split Bartik's CSS into SMACSS style components

Issue #2278017 by cilefen, bircher, effulgentsia: When a content entity type providing module is uninstalled, the entities are not fully deleted, leaving broken reference

Issue #2183983 by Gábor Hojtsy, vijaycs85, Berdir, Wim Leers, webflo, alexpott: Find hidden configuration schema issues