WPML Advanced Custom Fields Multilingual 2.1.5

Fixed an issue with overwriting translation preferences for repeater fields when preferences were set on the post edit screen.

Removed field hints when field is displayed somewhere other than the Field Group editing screen.
Checkbox to synchronize repeater subfields is now only displayed when a post has a repeater field.
Translation preferences for flexible and repeater fields are visible again.
Repeater synchronization checkbox state is saved and remains in that state after the next page load.

Fixed an issue where empty values are not changed into null for the Group field type.