It looks ok now (at least as good as my (very limited) artistic
skills allow), with preview & controls nicely hiding when the
box looses fox and re-appearing when it regains focus (with
a nice slide animation).
Ufff... this took far longer than it should. (Part of) the problem
was that the browsers (or at least Chrome) quite aggresively
cache favicons. So maybe I had it right for a long time and
was getting default MLstate favicon because of that.