copy instance values in data view to clipboard (explore)

refs #643

Change-Id: Ibb73a7c9f6cc16d947b7ac8c09851591af741ab2
Reviewed-on: http://gerrit.esdi-community.eu/3144
Tested-by: Jenkins <sitemple@igd.fraunhofer.de>
Reviewed-by: Simon Templer <simon.templer@igd.fraunhofer.de>