This is the latest upstream version, available at this URL: https://github.com/mbostock/d3/releases/tag/v3.5.3
This reverts commit 7613e69. Looks like this code is still in use after all...
Some of the UI strings are from https://bugzilla.mozilla.org/show_bug.cgi?id=1108013.
If we build the XPI with a more recent version, the add-on won't work on Firefox ESR anymore.
…ng behavior that pushes controls offscreen.