More editor stuff...

[Thomas Mailund Jensen <mailund daimi aau dk>]

I was working on adding links and show/hide facilities to the editor
widget, but that and the highlighting got in a fight, it got messy, so
I decided to re-write the test program.

It's basically the same program, but now with dialogs to change the
highlight patterns.

Get the source or check out the screen shots at
<URL:http://www.daimi.aau.dk/~mailund/gtk.html>

/mailund