As noted in meshtastic/web#179, it would be great to be able to
send traceroutes from the web application.
This patch adds a button to the messages page that sends a
traceroute to the selected node.
Nodes never heard before show hop count of 0, and not via MQTT.
However, reality is we've never connected to them. So, mark them as
'-' in the Connection Info column in the nodes table.
As requested in meshtastic/web#195meshtastic/web#209, information
about whether nodes were connected by MQTT is highly useful for
users of the web interface.
This patch adds a new column to the Nodes page which lists whether
a connection is direct (0 hops, via lora), or how many hops away
and whether the connection is via MQTT.
fixesmeshtastic/web#195fixesmeshtastic/web#209
