MudDataGrid: Fix GroupExpanded not working

[ghost]

Description

Fixes GroupExpanded not working regression in #6555

How Has This Been Tested?

unit | visually

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• The PR is submitted to the correct branch (dev).
• My code follows the code style of this project.
• I've added relevant tests.

[codecov]

Codecov Report

Patch coverage: 83.33% and project coverage change: -0.01 ⚠️

Comparison is base (cdbeeed) 91.42% compared to head (cb0d6bb) 91.41%.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #6604      +/-   ##
==========================================
- Coverage   91.42%   91.41%   -0.01%     
==========================================
  Files         398      398              
  Lines       14954    14955       +1     
==========================================
  Hits        13671    13671              
- Misses       1283     1284       +1     

Impacted Files	Coverage Δ
...MudBlazor/Components/DataGrid/MudDataGrid.razor.cs	88.02% <83.33%> (-0.21%)	⬇️

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[henon]

Awesome, thanks @alfadelta88

FYI @HClausing, @tjscience

[PaulTodd]

@henon @alfadelta88 GroupExpanded still doesn't seem to be working in the latest version: https://try.mudblazor.com/snippet/wOmxkzaxzeKJAHca

[HClausing]

@henon @alfadelta88 GroupExpanded still doesn't seem to be working in the latest version: https://try.mudblazor.com/snippet/wOmxkzaxzeKJAHca

I'm not sure about it, but it can be present only in preview release.

[henon]

I just released v6.2.3. If it is still not working let us know.

[PaulTodd]

That seems to have fixed it. Thank you.