2D -> 1D navigation

[ekg]

It'd be useful to go from 2D to 1D by clicking on the 2D view.

I'm sure you have a plan to do this, just bookmarking it.

[chfi]

It tries to center the 1D view on the node when you right click on one in 2D, but it doesn't do any zooming yet, so nothing happens with the default/fully zoomed out view.

Any suggestions on how it should behave? I wouldn't want it to be too disorienting, and there's a lot of edge/extreme cases.