Avoid querying for cursor position when it's not necessary #4448
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PR Summary
Fix #3879
The lagging is due to PSReadLine queries for cursor position for every key stroke even when it's unnecessary.
This change avoids querying for cursor position when it's not necessary. Also skip terminal window resizing check when we've rendered very recently (< 50ms), because a window resizing is unlikely to happen in such a short time interval.
The change has been verified by the user: #3879 (comment)
PR Checklist
Microsoft Reviewers: Open in CodeFlow