ctools 8.x-3.0-alpha21

Changes since 8.x-3.0-alpha20:

• #2646286 by tim.plunkett, EclipseGc: Remove selection logic/conditions from the BlockDisplayVariant
• #2646284 by dsnopek: Move panels block plugin schema to CTools
• #2631120 by dsnopek: "Entity view" block showing first entity rendered on all pages
• #2640392 by dsnopek: ConditionDelete puts a 'validate' method on '#validate' that doesn't exist
• #2640472 by samuel.mortenson: \Drupal\ctools\Form\ManageConditions submit text not clear
• #2615444 by Berdir, juampynr: Make typed data resolver actually work with typed data interfaces
• removing a test I did not mean to add
• #2642786 by dsnopek: FIX: Improve dependency injection in BlockDisplayVariant
• #2642786 by dsnopek: Improve dependency injection in BlockDisplayVariant
• #2639926 by dsnopek: PHP warnings on BlockDisplayVariant::setConfiguration()
• #2639526 by dsnopek: Calling BlockDisplayVariant::setConfiguration() won't change results returned from plugin collections
• Merge branch '8.x-3.x' of git.drupal.org:project/ctools into 8.x-3.x
• Improved the TempstoreConverter to include handling for default entities that are stored in the database during edits and provided a custom Access methodology that allows individual wizard implementations to control access to generic UIs provided by reusable plugin types.
• #2623888 by dsnopek, eclipsegc: Add ParamConverter that pulls entity out of the tempstore