Set state to unpublished when save2copy

When the action save2copy is triggered, the article becomes automatically published.
The new (copy) article title (and alias) are automatically changed and this is immediately visible in the front-end, even before any editing that the user may wish to perform (including changing the article title).
By changing the publishing state to "unpublished" at the same time the copy is created, the article is "hidden" until any revision becomes final and ready to become published.