[issue24750] IDLE: Cosmetic improvements for main window

[Terry J. Reedy]

Terry J. Reedy added the comment:

Revised plan: use ttk in 3.6 and only 3.6.  I will revise scroll patch for new file names, retest, and apply if good.

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assignee:  -> terry.reedy
stage: needs patch -> commit review
versions:  -Python 3.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue24750>
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