Reconstitute a Morph from the selected file, presumed to be represent a Morph saved via the SmartRefStream mechanism, and open it in an appropriate Morphic world.
Load the project, and make a thumbnail to it in the current project.
ProjectLoading thumbnailFromUrl: 'http://www.squeak.org/Squeak2.0/2.7segments/SqueakEasy.extSeg'.