Advanced Custom Fields Pro 6.3.11

* Fix - ACF Blocks no longer trigger a JavaScript error when fetched via AJAX

* Security Fix - ACF now generates different nonces for each AJAX-enabled field, preventing subscribers or front-end form users from querying other field results
* Security Fix - ACF now correctly verifies permissions for certain editor only actions, preventing subscribers performing those actions
* Security Fix - Deprecated a legacy private internal field type (output) to prevent it being able to output unsafe HTML
* Security Fix - Improved handling of some SQL filters and other internal functions to ensure output is always correctly escaped
* Security Fix - ACF now includes blank index.php files in all folders to prevent directory listing of ACF plugin folders for incorrectly configured web servers

* Fix - ACF Blocks in widget areas no longer cause a fatal error when no context is available
* Fix - ACF Blocks with no fields assigned no longer show a gap in the sidebar where the form would render