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 #1711070 by kid_icarus, tim.plunkett, xjm, droplet, zendoodles and cam8001: Convert tests to use ::$modules property instead of parent::setUp($modules).

Issue #1592632 by tim.plunkett, sun, Berdir, Rob Loach, aspilicious: Merge List field types into Options module.

Issue #1541792 by tim.plunkett, chx, Amitaibu: Enable dynamic allowed list values function with additional context

Issue #1373142 by sun, beejeebus, aspilicious, amateescu: Use the Testing profile. Speed up testbot by 50%.

Issue #965300 by Gábor Hojtsy, xjm: Change LANGUAGE_NONE to LANGUAGE_NOT_SPECIFIED; add LANGUAGE_NOT_APPLICABLE and LANGUAGE_MULTIPLE.

Nate Lampton authored Oct 30, 2011 and catch committed Nov 01, 2011

Issue #22336 by quicksketch, scor, boombatower, and rfay. Move all core Drupal files under a core subdirectory.

- Patch #735426 by yched, mr.baileys: fields with select widget: first option is selected by default even if no 'default value' set for the field.

#500866 by boombatower, solotandem: Remove t() from assertion messages in SimpleTest, so translators do not get 1000s of bogus strings.

- Patch #384992 by effulgentsia, sun: drupal_html_id() does not work correctly in AJAX context with multiple forms on page.

#635202 by yched and sun: Remove #process pattern from option widgets (plus buckets of tests for option widgets).

#606526 by axyjo and scor: Remove trailing whitespace and add newlines at end of files. Sorry, folks! But it is after code freeze. :)