Issue #2291443 by marcingy: Convert comment_field_instance_config_delete query to entity query.
Issue #2293643 by joshi.rohit100: Fixed OpmlFeedAdd form still using url() instead of \Drupal::url().
Issue #2259317 by effulgentsia: Remove _system_path usage from system_test.module.
Issue #1529814 by mgifford, JohnAlbin, ibullock, dcmouyard, mark.labrecque, andrewmacpherson, vegantriathlete: Fixed skiplink behavior for Webkit browsers.