[issue17942] IDLE Debugger: Improve GUI

[Terry J. Reedy]

Changes by Terry J. Reedy <tjreedy at udel.edu>:


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assignee:  -> terry.reedy
stage: needs patch -> patch review
versions: +Python 3.6, Python 3.7 -Python 2.7, Python 3.4, Python 3.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17942>
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