Barn2 Media - Document Library Pro 1.16.1

* Tweak: Improved accessibility when document folders are enabled.
* Tweak: Minor improvements to the code.
* Fix: Fatal error when using the "content" attribute in the shortcode.

* New: Automatic featured images for documents with linked PDF or image files.
* New: Added a default 'Uncategorized' document category.
* Tweak: Set document expiry dates via the CSV import.
* Tweak: Added a unique CSS class per document to the document grid card HTML.
* Fix: Filters were displayed on the grid based on table columns and not grid content.
* Fix: The download count was counting visits to the single document page.
* Dev: Updated Barn2 internal libraries.

* Fix: Folder categories and table column categories were not hidden when protected with Password Protected Categories.
* Fix: Fixed cf: not working in shortcode if value has @.
* Fix: Fixed search_on_click bug not working for default true value.
* Dev: Added filter `document_library_pro_folder_categories` to filter folder categories.
* Dev: Added filter `document_library_pro_data_column_terms` to filter a column terms.
* Dev: Tested up to WordPress 6.6.2