When cloning: no need for special handling.
When cloning: no need for special handling.

Previously Vector layers wouldn't be cloned, but recreated from scratch
and would e.g. loose styling from StyleMaps. See #217.

bentrm/geoext2,m-click/geoext2,geoext/geoext2,chrismayer/geoext2,Sundsvallskommun/geoext2,m-click/geoext2,geographika/geoext2,chrismayer/geoext2,geoext/geoext2,geographika/geoext2,marcjansen/geoext2,bentrm/geoext2,annarieger/geoext2,annarieger/geoext2,marcjansen/geoext2,Sundsvallskommun/geoext2,Sundsvallskommun/geoext2