Fixing a bug preventing starred thumbs from being saved.

Currently my starred gifs don't show when I select them under the "starred" menu item. Best I can tell, not having `&***source` in the link in gif_template.html causes the thumbnail value to be nil in ORGIFController - https://github.com/orta/GIFs/blob/master/objc/GIFs/ORGIFController.m#L89. It also seems to cause `imageBrowserSelectionDidChange:` to cause an exception since the gif.imageRepresentation is nil.

I ran a few checks to make sure and thumbnails for new starred items seem to be working for me with this fix. I'm not sure what `&***source` is supposed to be so I'm just dropping that in with no value for now.