[issue4630] IDLE: add cursor noblink option

[Terry J. Reedy]

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


----------
pull_requests: +20738
pull_request: https://github.com/python/cpython/pull/21599

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue4630>
_______________________________________