So far that only moves unarchiving and the check if that succeeds to
within the wizard.
To be extended with additional checks for the archive content's sanity.
Change-Id: I6798937826fbe9cb584d83a920e67b6cfcc119ed
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
It will become more complicated, so pull it into its own files.
Change-Id: If362f0775cc9d97a3c715c046d32d6a20c30a1f9
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>