* Core: Major JavaScript updates
* Core: Improved conditional logic with new types and more supported fields
* Core: Improved localization and internationalization
* Repeater field: Improved logic that remembers collapsed row states
* Repeater field: Added support to collapse multiple rows (hold shift)
* API: Improved lookup to find fields without a reference value
* Language: Added Croatian translation
* Language: Updated Italian translation
* Language: Updated Romanian translation
* Language: Updated German translation
* Language: Updated Arabic translation
* Language: Updated Portuguese translation
* User field: Added new 'Return Format' setting (Array, Object, ID)
* Core: Added basic compatibility with Gutenberg - values now save
* Core: Fixed bug affecting the loading of fields on new Menu Items
* Core: Removed private ('show_ui' => false) post types from the 'Post Type' location rule choices
* Core: Minor fixes and improvements
* Language: Updated French translation - thanks to Maxime Bernard-Jacquet
