-fix - print single page
-fix - lightbox click sometimes not opening the flipbook
-fix - admin page bug with page reload after ajax response
-fix - some PDF rendering issues fixed by updating pdf.js
-fix - scrolling to top after closing lightbox
-fix - elements covering fullscreen flipbook on iOS
-new - option Settings > Advanced > User role - select which user role can manage flipbooks (admin, editor, author)
-new - shortcode parameter "thumbalt" to add alt attribute to flipbook thumbnail image
