Currently determine_hovered_item() assumes that each item is
opts.font_size pixels tall, which usually works well. This breaks with
fonts that get drawn taller than that, such as Japanese text, which
makes the calculation inaccurate for the top items and clips the
counter. A couple of users reported that it is inaccurate for them for
the top items even with ASCII characters in track selectors, presumably
because the circles are taken from a different font and make all lines
taller.
To fix this place each selectable item in its own ASS event positioned
like determine_hovered_item() expects.
Unfortunately this breaks --profile=box, so keep placing every item in
one ASS event with it.
Guido Cella
c438732b23