Move Image+FS rather than Image+Only with Datasets (Fix #10380)

Image+Only does not concern itself with fileset links or with
well sample links, therefore when the Dataset was moved, and
Fileset links found to the Image, the Image was left where it
was. Now, the links are followed and **all** the Images in the
Fileset are **also** moved.
Merge pull request #777 from joshmoore/10380-move-fs-images

Fix FS moves (10380)