JSON validation added to UI. This has been implemented through the use of a flag
to enable/disable the functionality with a watcher on the value to set the
success/error class on the textarea itself.
No hard validation added to the field.
Adds a new section to the node information, Network Tomography. There's a radar
plot of the distances (in ms) between the current node and its peers as well as
min, avg, and max.
Jack