[Etoys] Force TileMorph height

[Yoshiki Ohshima]

> >   Hmm.  It is conceivable.  We have horrible #fixLayout method that
> > almost do it.  It could traverse the script editor and install the
> > cell size value.  (Which it should, in case we change the default
> > font.)
> I made a change just like that and it seems to work pretty well. I 
> noticed it missed old random number tiles, I have to look into that. But 
> for the rest of the script it got a improved look.
> 
> I have not tested with really old scripts from before the font changes 
> yet, but I guess it should work.

  Cool.  #fixLayout is horrible, but if it continue to exist, it
should as well do the best thing it can do.  Whenever you feel ok,
please send the patch around.

-- Yoshiki