Air Cluster 1.3.0, new version

List of changes:
-Added Nextcloud support.
-Added Owncloud support.
-Updated Dropbox search.
-Show the account name on the Oauth external connection window.
-Improved uploading files to Dropbox.
-Faster synchronization with Box.
-Fixed compatibility issue with Synology SFTP.
-Fixed error copying files or folders in some webdav servers.
-Removed 2GB file limit for HiDrive.
-Improved stability.
-Added Japanese translation (Thanks to Tilt).
-Added Italian translation (thanks to Marco).
-Added Belarusian translation (thanks to Alexander).
-Updated Hungarian translation (Thanks to John).