Target names in graph are truncated

[AliSoftware]

Hello again!

I've noticed that when the name of the targets gets a bit long, since the Y axis is too far left, the labels of the target names on that axis are truncated.

Is there a way to fix that?

Even if it's just by tweaking manually the generated JS or whatnot manually for now, I'd be interested for you to point me out where to change that in the JS (I have no experience with d3js), and starting from that I could make a PR (to either try to compute the proper value based on the max width of all target names, or provide a parameter to the CLI to allow to adjust it)

Thanks!