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gnocl::statusIcon

I completed the code for the various options associated with the statusIcon notify command. This has proven quite interesting as it need the inclusion of functionality from libraries not part of gtk+, namely libnotify and libcanberra. There's not much out there by the way of useful rookie literature for these objects apart from the online docs and whole pile of emails in the cloud from programmers trying, but necessarily getting the features to work. That's the useful, really useful thing about the Tcl approach, all the work is done in advance!

There's so much to todo that's all in mid-air, but I think its time to take another look at beefing up the 'recent docs' menu item.

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