[RC1/9.0] Backport MenuItemFix

[KlausLoeffelmann]

Backport the Menu Item Fix (#11920) into .NET 9RC1 to fix #11909.

Since the original bug fix used Properties-APIs, which are not available in .NET 9RC/Rel, a few adjustments had to be made here.

Customer Impact:

The original A11Y PR introduced a breaking change, and it is specifically blocking Rick Brewster (the maintainer of Paint .NET) to migrate Paint.NET to .NET 9, which is another reason why I would like this to get in into RC1 already, to unblock all folks, who have been started to migrate to .NET 9 and are blocked by this.

Workaround: There is none.

Regression?

• Yes from the previous release
• No

Risk

• High
• Medium
• Low –The changes are isolated and are not affecting anything else. This PR is effectively a revert of the A11Y PR, which needs a different approach. We are not considering the A11Y issue High Prio issue, so it can be addressed again in .NET 10.

Verification

• Manual testing – Several manual tests made sure that this issue has been mitigated.
• Automated

Microsoft Reviewers: Open in CodeFlow

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 74.79469%. Comparing base (701b3b1) to head (58f15fd).
Report is 3 commits behind head on release/9.0-rc1.

Additional details and impacted files

@@                    Coverage Diff                    @@
##           release/9.0-rc1      #11930         +/-   ##
=========================================================
- Coverage         74.79692%   74.79469%   -0.00223%     
=========================================================
  Files                 3019        3019                 
  Lines               630034      630010         -24     
  Branches             46781       46777          -4     
=========================================================
- Hits                471246      471214         -32     
- Misses              155411      155419          +8     
  Partials              3377        3377                 

Flag	Coverage Δ
Debug	74.79469% <0.00000%> (-0.00223%)	⬇️
integration	18.03583% <0.00000%> (+0.00082%)	⬆️
production	47.78483% <0.00000%> (-0.00723%)	⬇️
test	97.00837% <ø> (ø)
unit	44.80782% <0.00000%> (-0.01063%)	⬇️

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