[UI] New version of Widgets on SqueakSource

[Gary Chambers]

There is a new version of the UI Widgets on SqueakSource (230) for the brave
again. Have been holding off updating the Universe (not least because I've
forgotten my password already, but, the Universe is better off without too
many minor versions).

Some general performance improvements, at least for me (much more spritely
here). Looking for feedback...