Issue #1836008 by dawehner, Berdir, alexpott, katbailey, effulgentsia, EclipseGc: Fixed Remove drupal_classloader() use in Drupal\Core\AnnotatedClassDiscovery.
Issue #1874936 by frega, Wim Leers: Pluggable in-place editors (allow modules to define new Create.js PropertyEditor widgets).
Issue #1876992 by yched, Wim Leers: Fixed Toolbar doesn't show the 'Edit' tab: fix by using new entity display settings, add tests.
Issue #1852966 by yched, Stalski, zuuperman, swentel: Rework entity display settings around EntityDisplay config entity.
Revert "Issue #1852966 by yched, swentel: Rework entity display settings around EntityDisplay config entity." This reverts commit 8ad67af2.
Issue #1852966 by yched, swentel: Rework entity display settings around EntityDisplay config entity.
Issue #1824500 by Wim Leers, tkoleary, frega, jessebeach, henribergius, effulgentsia, nod_, yched: In-place editing for Fields.
