Wicked Folders Pro 3.1.3

Revert changes made for Polylang in 2.23.5 to fix items not displaying in folders when Polylang is active

Add `wicked_folders_construct_screen_state` filter to allow folder screen state to be overridden
Fix style conflict with Advanced Custom Fields (ACF) fields that use Select2
Fix PHP notices that can occur when saving screen state
Fix folder pane disappearing after deleting TablePress table
Fix copied TablePress table not assigned to folders after copy
Fix folder pane disappearing after deleting TablePress table
Fix copied TablePress table not assigned to folders after copy

Fix ampersands displaying as character entities in folder names
Add JavaScript filter that can be used to change the initial parent used when rendering the folder select dropdown
Dim folder toggle arrows to more easily identify which folders have child folders
Add empty 'lang' attribute to folder term query so that folders are displayed regardless of language when using Polylang
Add `wicked_folders_folder_term_query_args` filter to allow folder term query arguments to be filtered
Fix PHP error that can occur when checking for updates
Fix JavaScript error that can occur when a media library folder hasn't previously been selected