Convert to SWT Components

[GoogleCodeExporter]

The Swing components we are using look very bad on some platforms
(particularly Linux with GTK).  The SWT kit uses all native components, so
it should look nice on all platforms.  As a consequence, the API is very
different, and the component set is a little more limited.  This would take
a bit more work, but would be quite an improvement.

Original issue reported on code.google.com by swegn...@gmail.com on 12 Mar 2008 at 6:30