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"),