http://bugs.impara.de/view.php?id=5242

In Squeak 3.8, the default window title font (BitstreamVeraSans) was  
not bold. In 3.9, somehow it got reverted back to being bold, and  
with BitstreamVeraSans bold this is an excessively wide, chunky font.  
Most UI's don't have fonts this fat in their window titles.

This changeset fixes things so that:
* It's non-bold by default, as it was in 3.8
* You now have the option to select a bold or non-bold window title  
font with the "system font" menu, instead of it being forced as bold.

This would be a good tweak to add to 3.9 (if it's still not "final"),  
or 3.9.1.

- Doug