Add rqt_graph display for nodes and topics
IDEAS:
Use a ros-node, similar to the bag-node, to run a command line that generates the rqt_graph and saves it as an image on the host PC. Then the web page points to that image.
IDEAS:
Use a ros-node, similar to the bag-node, to run a command line that generates the rqt_graph and saves it as an image on the host PC. Then the web page points to that image.