[issue20917] Idle: Enhance font change notification system

[Mark Roseman]

Mark Roseman added the comment:

The new 'component' infrastructure provides the mechanism for passing these kinds of notifications around. Allowing extensions (in whatever form they'll exist with the new stuff) to take part in this notification mechanism would be  a small (and sensible) addition to that.

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nosy: +markroseman

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20917>
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