index.html.in,TODO: fix the QR placement issue

index.html.in,TODO: fix the QR placement issue

It turns out, we DON'T need to adjust our vertical offsets by the
svg-to-client unit ratio. I don't fully understand why, but I think it
has something to do with declaring the height of the tableau to be
fixed at 100% = 1080, and modern browsers treating "pixels" as an
abstraction. In any case, it works fine without the fudge factor in
both WebKit and Firefox.