MudInput: Fix legend style incorrectly inherited to child components

[charles7668]

Description

Close #10681

How Has This Been Tested?

Add a test viewer page named TextFieldNestedInFieldTest

Type 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)
• Documentation (fix or improvement to the website or code docs)

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

All modified and coverable lines are covered by tests ✅

Project coverage is 91.80%. Comparing base (f20e5ff) to head (fe6fae6).
Report is 2 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev   #10683   +/-   ##
=======================================
  Coverage   91.79%   91.80%           
=======================================
  Files         426      426           
  Lines       13389    13400   +11     
  Branches     2577     2578    +1     
=======================================
+ Hits        12291    12302   +11     
  Misses        527      527           
  Partials      571      571           

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[Anu6is]

Can you add the nested example to the test viewer with the others

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[charles7668]

Can you add the nested example to the test viewer with the others

Added

[danielchalmers]

Fantastic, thanks for the quick fix.