Change to support new dynamicgeom behavior- if UUID of dynamicgeom is new, then we need to unload any old dynamicgeoms.
Change to support new dynamicgeom behavior- if UUID of dynamicgeom is new, then we need to unload any old dynamicgeoms.

steptools/NC.js,steptools/NC.js,steptools/StepNCViewer,steptools/StepNCViewer,steptools/StepNCViewer,steptools/NC.js