Issue #1994140 by Berdir, yched, fgm, smiletrl: Unify entity field access and Field API access.
Issue #2096271 by chx: Make it easier to extend entity query.
Issue #2004244 by Berdir, plach, tim.plunkett, msonnabaum, das-peter: Move entity revision, content translation, validation and field methods to ContentEntityInterface.
Issue #1952062 by vijaycs85, willyk, pfrenssen, vasi1186, CMS Dude, manningpete, penyaskito, kfritsche, Gábor Hojtsy: Remove legacy translation module in favor of content translation.
Issue #2076411 by dawehner: Fixed Remove the request scope from the current user service.
Issue #2095219 by hrmoller: Fixed incorrect params in ModuleHandlerInterface::invokeAll().
Issue #2100753 by Berdir: Fixed route_parameters break lazy-save logic in MenuLinkStorageController::save().
Issue #2000384 by yuradoc, Damien Tournoud, alexpott: Fixed php-intl module causes problems with Date and Time fields when editing Basic Page.
Issue #2090947 by Bladedu: Fixed SearchPluginManager plugin definitions aren't cached.
Revert "Fixing commit message: Change KeyValueFactory to use Settings instead of $conf"

This reverts commit 227f21b3225f1e4f933a4e85b4e298d13d32c3cf.
Issue #2098111 by chx: Fixed Change KeyValueFactory to use Settings instead of $conf.
Issue #2047997 by jlindsey15, swentel: Get rid of field_behaviors_widget().
Cleanup individual theme route logic
WIP System routing update
Doc and use cleanup of derivative
Start converting a bunch of local tasks.
Testing stuff.
Cleanup Aggregator tasks and tests.
Support testing task derivatives
Convert blocks to plugin local tasks