Fix a few VI key handlers to close edit group properly

[daxian-dbw]

PR Summary

Fix #1281

I copied the code in Repalce.vi.cs from #2012 (thanks @springcomp!) to fix the instances where edit group was not correctly ended when searching fails. I also copied a test from #2012 and added 2 more tests.

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:

[daxian-dbw]

@springcomp Can you please take a look at this PR? As called out in #2012 (review), I'd like to see if we can make the VI mode works as expected while requiring balanced edit groups. Thanks!

[springcomp]

@daxian-dbw Sure please let me a bit of time for feedback and to rework the other PRs more thoroughly.

[springcomp]

This captures the spirit of my initial PR to the perfection.
Looks great to me.

[daxian-dbw]

@springcomp Thanks for the feedback! I have updated the comments as you suggested.