WP Media Folder - JoomUnited 5.8.4

* Add : Pdf embed in Gutenberg editor improvement
* Add : Aspect ratio option in gallery default, slider, portfolio theme
* Add : Remote video improvement with new video format

* Fix : Gallery lightbox conflict with lightbox of Enfold theme
* Fix : Gallery masonry conflict with Divi modal & Smush lazyload
* Fix : Error PHP when sync server folder

* Add : Possibility to download folder in the media library
* Add : New uploader style
* Fix : Single file download style
* Fix : Update new placeholder image for page builder and classic editor
* Fix : Gallery masonry column on mobile