style: consistent nav link padding

[huntabyte]

Closes #456

The nav links that aren't dropdowns were receiving x-axis padding causing inconsistent spacing between nav links.

Before:

After:

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Name	Status	Preview	Comments	Updated (UTC)
omnisite	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 19, 2024 1:23am

[Rich-Harris]

thanks! needed a change to make it work, since the .dropdown selector applies to a different component, but it looks much better now