Support Brandfolder labels in Drupal media type config

This feature is now available in the 4.x and 5.x versions!

Label hierarchy is supported and handled as follows:

• If an allowed label has other labels nested beneath it, then assets associated with any of the descendant labels will also be allowed (if not disallowed).
• If a disallowed label has other labels nested beneath it, then assets associated with any of the descendant labels will also be disallowed.
• If you wish to allow a label but not [all of] its descendants, you can select the applicable descendants in the Disallowed > Labels field.

Automatically closed - issue fixed for 2 weeks with no activity.