Make HistorySearchBackward and HistorySearchForward able to navigate the prediction list view

[daxian-dbw]

PR Summary

Fix #1933

The UpArrow and DownArrow are bound to PreviousHistory and NextHistory by default, However, it's not uncommon for users to re-bind UpArrow and DownArrow to HistorySearchBackward and HistorySearchForward, and in that case, navigating the prediction list view would be broken.

This PR makes HistorySearchBackward and HistorySearchForward able to navigate the prediction list view, just like PreviousHistory and NextHistory.

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]

@andschwa Please review when you have time. Thanks!

[andyleejordan]

Great tests!

[ghost]

🎉 v2.2.1-rc1 has been released which incorporates this pull request. 🎉