import of SVG with viewbox attribute overrides centering

via a reddit post https://www.reddit.com/r/openscad/comments/1in51qq/comment/mcaw2im/ by @garblesnarky

import("test.svg", center=true);

with test.svg

doesn't result in the imported file living at the origin. the user determined a viewbox attribute is the reason.

I was assuming this was a bug, but from the svg centering code it could be intentional? I'm looking for clarification so I can add an appropriate testcase, and a fix (or not).