[issue42239] IDLE: Restore or keep calltip when needed

[Tal Einat]

Tal Einat <taleinat+python at gmail.com> added the comment:

We already have a "<<refresh-calltip>>" virtual event which is triggered upon typing a closing parenthesis ')'. We could just have it always call "open_calltip()" rather than only doing so when one is already open.

See PR GH-23100.

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