Advanced Custom Fields Pro 6.2.9

* New - Added Dark Mode styles for the [Dark Mode Plugin](Dark Mode).
* New - Added "Value Contains" condition to the Select field type.
* New - Added support for the WooCommerce product type dropdown to trigger "update metaboxes".
* Tweak - Improved acf.screen model responsible for "updating metaboxes" when changing post data.
* Tweak - Removed user fields from the multisite "Add New User" page.
* Fix - Fixed bug preventing some tinymce customizations from working.
* Fix - Fixed JS bug throwing "preference" error in console.
* Dev - Added action 'acf/enqueue_uploader' triggered after the hidden "ACF Content" editor is rendered.

* Fix - Fixed bug preventing the Google Maps Field address from being customised.
* Fix - Improved logic to request and cache plugin update information.
* Fix - Fixed bug preventing JS initialization when editing widgets in accessibility mode.
* Fix - Added missing $parent argument to term_exists() function when adding a new term via taxonomy field popup.
* Fix - Fixed bug where nested Group Fields did not delete their values.
* Fix - Fixed JS error thrown by localStorage if cookies are not enabled.
* Dev - Bumped minimum WP version requirement to 4.4.
* Dev - Added action 'wp_nav_menu_item_custom_fields' for compatibility with other plugins modifying the menu walker class.
* Dev - Added 'multiple' to the allowed attributes for an email field.
* Dev - Added new ACF_Ajax class for upcoming features.

* Core: Minor fixes and improvements