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

[E. Paine]

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

> did problems occur without displaying any emoji

I was using an unmodified version of IDLE.

> If they include one of those characters in the font name displayed in the font list

This is not the case. It is listed simply as "Phaistos", when calling `tkinter.font.families()`.

> if we verify the report

Report verified. Behaviour is exactly as described, hanging when trying to load the "Configure IDLE" window. I will look into exactly which line is the problem soon.

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<https://bugs.python.org/issue45103>
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