Changing the renderMode to System when the StatusStrip was selected

[LeafShi1]

Fixes #12616

Proposed changes

• Revert the changes on PR 11502, the corresponding issue 11450 was fixed when issue 12083 was fixed, so the changes in PR 11502 are no longer needed.

Customer Impact

• When upgrading a project with StatusStrip from .net8.0 to .net9.0, there will no longer be extra white lines in the Form

Regression?

• Yes

Risk

• Minimal

Screenshots

Before

A white line in the dialog when using StatusStrip

After

No extra white line the dialog

The color contrast between the focus indicator and toolStripSplitButton1 is still sufficient

Test methodology

• Manually

Test environment(s)

• .net 10.0.0-alpha.1.24606.5

Microsoft Reviewers: Open in CodeFlow

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.02724%. Comparing base (a5281d9) to head (8d16b6c).
Report is 26 commits behind head on main.

Additional details and impacted files

@@                 Coverage Diff                  @@
##                main      #12646          +/-   ##
====================================================
- Coverage   97.03492%   76.02724%   -21.00768%     
====================================================
  Files           1182        3181        +1999     
  Lines         354561      639676      +285115     
  Branches        5411       47216       +41805     
====================================================
+ Hits          344048      486328      +142280     
- Misses          9724      149820      +140096     
- Partials         789        3528        +2739     

Flag	Coverage Δ
Debug	76.02724% <100.00000%> (-21.00768%)	⬇️
integration	18.16567% <0.00000%> (?)
production	49.81214% <100.00000%> (?)
test	97.02915% <100.00000%> (-0.00577%)	⬇️
unit	47.01801% <100.00000%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

[Tanya-Solyanik]

Please investigate if the fix can be moved to the lower level rendering code