navbar: top level NavbarItem style mismatch with NavbarTrigger

This is visible in the demo at https://dioxuslabs.github.io/components/component/?name=navbar&iframe=true&dark_mode=false if you look closely.
The first two options have dropdowns and are larger and vertically aligned differently than the third "Home" one without the dropdown.

`.navbar-item` has `font-size: 14px` but there's more differences than just that.