Windows widget layout non-ideal

[GoogleCodeExporter]

I've noticed recently that on Windows, the calendar widget looks wonky
(it's too small for its containing area).  Also, I seem to recall that some
of the other widgets sizes are ... "off".  Need to take a look at either
dynamically calculating proper sizes, or maybe just doing the right thing
in the .xrc resource file.

Original issue reported on code.google.com by cmpilato on 19 May 2008 at 2:06