Restoring a version should clear the unversioned changes '+' indication

This is caused by webui specifically setting the checkout parameter to true for the restore version automation. 

https://github.com/nuxeo/nuxeo-web-ui/blob/cd03fbc263e8ce210c988ea40a2634a8f056e436/elements/nuxeo-restore-version-button/nuxeo-restore-version-button.js#L101

Steps:

• create a document
• create a version 1.0
• modify the document (edit the title or description) ans save=> webui shows v1.0+
• restore v1.0

Result: webui still shows v1.0+

Expected result: webui shows v1.0