Message 192092 - Python tracker

Todd, do you have a Mac to test this on?

This patch treat sending messages to a widget as a backup option. In 18318 I propose we make Idle a true gui app, with all messages other than 'No tkinter' handled by the gui. Console writing, when available, would then be a secondary option for those who want it. But in the meanwhile, I would like this or something like it applied.