Improve selected node data presentation
Improve selected node data presentation

- Remove "refs" from certain keys to make them look prettier
- Actually print out the data for 'granular_markings' and 'objects' properties, instead of just printing "[object Object]"

clenk/cti-stix-visualization,oasis-open/cti-stix-visualization,oasis-open/cti-stix-visualization,oasis-open/cti-stix-visualization,clenk/cti-stix-visualization