Fix: Update style for the .defaultHidden to resolve Bug: #6750

[D34NM]

Description

The fix is a simple CSS style change. The style for the .defaultHidden class was applied on the "layer" above the actual menu item.

Fixes # (issue)

Bug #6750

Checklist

• Is this feature complete?
  • Yes. Ready to ship.
  • No. Follow-up changes expected.
• Are you including unit tests for the changes and scenario tests if relevant?
  • Yes
  • No
• Did you add public API?
  • Yes
    • If yes, did you have an API Review for it?
      • Yes
      • No
    • Did you add <remarks /> and <code /> elements on your triple slash comments?
      • Yes
      • No
  • No
• Does the change make any security assumptions or guarantees?
  • Yes
    • If yes, have you done a threat model and had a security review?
      • Yes
      • No
  • No
• Does the change require an update in our Aspire docs?
  • Yes
    • Is this introducing a breaking change?
      • Yes
        • Link to aspire-docs issue (please use this breaking-change template):
      • No
        • Link to aspire-docs issue (please use this doc-idea template):
  • No

Microsoft Reviewers: Open in CodeFlow

[JamesNK]

This is incorrect. The ... button should only be visible when hovering over the grid value.

I can't reproduce the reported issue: #6750 (comment)

cc @mitchdenny

[D34NM]

@JamesNK wasn't aware of it. But I could reproduce the issue described above. And it was visible, but I will close the PR. Thanks for the review :)