Missing actions when viewing a revision

Go to a page with several version and look at its history. You can click on one of the version in the list to view it.

It would be nice to have most of the standard view menu in that case. Among other things it would allow very easily to see a revision source or export it. Of course it means adding support for "rev=" URL parameter to all actions we provide here but "View Source" already supports it for example and right now accessing the source of one of the revision is a pretty much impossible from the UI.