Wicked Folders Pro 3.1.3

Fix JavaScript error that can occur when using folders on front-end due to Select2 only being registered on back-end
Fix behavior when dragging items from 'Unassigned Items' folder
Increase z-index of Select2 results when using Divi page builder

Fix issue causing media library to load all items
Fix insert media button in media modal being disabled after uploading a new file to a folder
Fix PHP error that can occur due to an invalid timezone identifier string
Fix media library folder pane resizer handle not visible
Fix media modal folder pane position when admin menu is folded and media modal is displayed on front end
Add ability to set selected folder on 'Upload New Media' screen via querystring parameter

Add work-around for issue caused by Polylang plugin mangling AJAX requests