Add a way to move a page with all its versions

The only way to move a page is to use the action in the standard "More actions" menu.

When doing this while on a versioned content page, there are two issues:

1. it only concerns the versioned content page itself. The user is not aware of it and might think that it will move the page with all its versions
2. it's difficult to move the page itself (including all its versions) because it's only accessible trough URL

I suggest to display a modal to give the choice of moving either the versioned content or the page and all the versions