NavBar: Fix Transparent background in list items

[ElishaSamPeterPrabhu]

Description

• Modified background color of Modus list

References
Fixes #2795

Type of change

• 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 update

How Has This Been Tested?

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

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[coliff]

hi! Please always run Prettier/Lint before making a PR otherwise I get notified to review your PR and can't because linting/build is failing.

[ElishaSamPeterPrabhu]

hi! Please always run Prettier/Lint before making a PR otherwise I get notified to review your PR and can't because linting/build is failing.

Sure Christian

[coliff]

If it fixes the bug then I'm happy to approve, but there is this not nice looking artifact with the rounded corners on dark mode.

This is present in the current version though doesn't look quite so bad (the gray is more of a a similar color perhaps?)

[jewel-shajan]

Testing completed and ready for PR Review