I am sorry,
yesterday I started to work on this, but I was working on sage 4.2
today I updated to sage 4.3.2, but I also noticed that in the
beginning of the file cell.py it is stated that it is part of the OLD
sage notebook...
now I should understand where to look again :)
maurizio
On 17 Feb,
ok, still me :P
I've found the relevant ticket http://trac.sagemath.org/sage_trac/ticket/7501
now I'll try to apply the patch. it seems to me that this is actively
worked on, and there should be some draft code on someone else's
computer, so I am probably not any helpful here.
cheers
maurizio