The new release allows to preview documents with OnlyOffice. That way
the preview is more precise for docx, xlsx and pptx documents.
The OnlyOffice should also scale better for larger environments as
opposed to the LibreOffice document conversion.
In addition a bug was fixed in the handling of uploads, where 0-byte size
where uploaded to some Nextcloud/ownCloud instances.
More details in the README.md
https://github.com/Zimbra-Community/owncloud-zimlet