Issue #1887244 by beejeebus: Use Config->save() and Config->delete() on import.
Issue #1887904 by larowlan: Fixed update_retrieve_dependencies() only considers enabled modules.
Issue #1884180 by dawehner: Cleanup base.js for real.
Issue #1853720 by vijaycs85, sun, Gábor Hojtsy: Fixed Hide language selection option is backwards.
Issue #1833716 by quicksketch, Wim Leers, effulgentsia: added WYSIWYG: Introduce 'Text editors' as part of filter format configuration.
Issue #1888942 by dawehner: Rename viewStorageController::attachDisplays().
Issue #1869328 by vijaycs85, Gábor Hojtsy, manningpete, YesCT: Restore simplicity of language list.
Issue #1889826 by tim.plunkett: DefaultFactory::getPluginClass() is very useful and should be public and static.
Issue #1411276 by swentel, anrikun, quicksketch: Fixed image.admin.inc: new effect options are double escaped (check_plain()).
Revert "Issue #1833716 by quicksketch, Wim Leers, effulgentsia: added WYSIWYG: Introduce 'Text editors' as part of filter format configuration."

Fixing commit credit.

This reverts commit ee1b6de69316f4b70905158b89dc86eb8095466c.
Issue #1833716 by quicksketch, Wim Leers, sun, TwoD: Added WYSIWYG: Introduce 'Text editors' as part of filter format configuration.
Issue #1874584 by kim.pepper: 'Block Library' link label is unclear.
Issue #1875504 by fabpot: Add the possibility to use services as controllers.
Issue #1253820 by yched, zserno, tim.plunkett, xjm, effulgentsia, plach: Fixed It's impossible to submit no value for a field that has a default value.
Issue #1885420 by kim.pepper, xjm: Document that node access queries on other tables need metadata
Issue #1875818 by Berdir: Update composer.json to use the latest stable 3.0.x version of Guzzle.
Issue #1880368 by dead_arm, tim.plunkett, stephen.colson, irk, ultimateboy, meyerweb, RobW, peruvianidol, babbage: Fixed Danling search box on add blocks page.
Issue #1871696 by tim.plunkett, xjm, sun, msonnabaum, EclipseGc: Convert block instances to configuration entities to resolve architectural issues.
Issue #1885644 by andypost, tim.plunkett: Fixed ImageStyle::uri() is broken and has no coverage.
Revert "Issue #1875948 by chx, fabpot: set sensible default values for Kernel default directories."

The 700 directory permissions are breaking Drush. Temporarily rolling back while we figure that out.

This reverts commit 595459b3277c759f353ee82ba5864ceac1e11dbb.