- make use of the SubscriberSegment::status column to keep track of unsubscriptions
- unsubscribed segments now appear grayed out in the Subscribers listing
- added unsubscribed_at after segment names when editing a subscriber
- added date() method for Twig (uses WP's date format / date_offset)
- fixed typo in Form iframe export
- fixed unit test for Newsletters
- updated selection component (JSX) to allow more customization
- added listing of custom fields in form editor
- ability to delete a custom field
- mades changes to the form editor in order to accomodate for the new custom fields system
- fix form editor bugs
- cleanup
