Fix admin sidebar menu items

What does this MR do?

Fixes a regression whereby certain sidebar menu items on the admin page would not get collapsed properly.

Looks like .nav-item-name was added to CE in https://gitlab.com/gitlab-org/gitlab-ce/commit/45bfc0922e0351d5bc6a44a9bba8f02850471461 but missed in EE specific nav items

Are there points in the code the reviewer needs to double check?

Shouldn't be

Why was this MR needed?

regression

Screenshots (if relevant)

Before	After

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/3175