Language Manager: 'Revert to Publish' function doesn't work in Compare window

Description

This issue both happens with CMS 9 & CMS 10.0.1

Steps to reproduce

1. Install Language Manager for a CMS site.
2. Enable English and svenska for the site.
3. Create a page (named Page01-English) in English then publish.
4. Enable Editing for svenska.
5. Create content in svenska for the above page (named Page01-svenska) then publish.
6. Open the Compare window for Page01-English & Page01-svenska
7. Change some text in Page01-svenska -> Autosave function is enabled. Click the Autosave button then select the Revert to Publish command. It does not take effect (although the Undo command works fine).

Note: The Revert to Publish function in the Publish option works fine too.