Some nodes may have a source field but not a url field, as @cgreene discovered with Pathways sourced from Reactome:
This PR makes it such that if there is no url, it doesn't show as a link, and doesn't mislead the user into thinking the link will take them somewhere.
Some nodes may have a
source
field but not aurl
field, as @cgreene discovered with Pathways sourced from Reactome:This PR makes it such that if there is no
url
, it doesn't show as a link, and doesn't mislead the user into thinking the link will take them somewhere.