jamon

yeah, they're already in a separate layer, so it should be pretty easy to enable/disable them. The bigger thing I think will be adding UI to allow filtering on the...

updated with a toggle button and using filtered nodelist instead of all nodes for lines. 

ah, crap. I accidentally caused this to close by renaming my branch to match the upstream change. restored it and attempting to reopen the request... @philon- if you'd like to...