Avoid triggering list view prediction when the first line was scrolled up off the screen buffer

[daxian-dbw]

PR Summary

Fix #3347

Avoid triggering the list view prediction when the first line was scrolled up off the screen buffer.

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Make sure you've added one or more new tests
• Make sure you've tested these changes in terminals that PowerShell is commonly used in (i.e. conhost.exe, Windows Terminal, Visual Studio Code Integrated Terminal, etc.)
• User-facing changes
  • Not Applicable
  • OR
  • Documentation needed at PowerShell-Docs
    • Doc Issue filed:

Microsoft Reviewers: Open in CodeFlow

[daxian-dbw]

Thanks @andschwa for the review!

[ghost]

🎉 v2.3.0-beta0 has been released which incorporates this pull request. 🎉