Resize bug

[toroidal-code]

Steps:
Open new tab, zoom graph out.
Open second tab, move graph around

Bug:
Graph resizes when moved after a new tab is opened.

[Katee]

Same thing happens if you open one tab, refresh and then drag. I'll look into this tomorrow.

[Katee]

I haven't found the magic incantation to tell d3 that the zoom has changed (I'm setting the translate and scale properties directly to the SVG object.)