[issue45103] IDLE: make configdialog font page survive font failures

[E. Paine]

E. Paine <xepaine13 at gmail.com> added the comment:

I am unable to reproduce on either Python 3.9.6 (Tk 8.6.9) or 3.10.0 (Tk 8.6.10).

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45103>
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