[ESS] Toolbar code [resend]

[Stephen Eglen]

Apologies if this was received before, but it didn't turn up in the
archives.

Thanks to Manuel for the report about toolbar not working in CVS Emacs;
I have just confirmed this in Emacs 23 pretest.  It seems that the Emacs
code has changed since I wrote ess-toolbar.el in 2004 (!), and then it
was regarded as proof of concept.  I will need to rewrite it to make it
compatible with Emacs 23.  I hope this does not break Emacs 22 in the
process!

Incidentally, does anyone set ess-toolbar-global to a non-nil value?
(The default is nil, so that the ess toolbar appears only in the ESS
buffers.)

Stephen