Show `NavTitle` from story_settings even if there's no `NavLink` field

[vivngo]

Right now the text will not show up in the NavTop component unless there's a link:

utils/nav2.js

Lines 128 to 139 in f0063ba

	if (navLink && navLink.url !== "") {
	navLinkInsert = `
	<a
	class="nav2-title"
	id="nav2-title"
	href="${navLink.url}"
	target="${navLink.target || "_blank"}"
	>
	${navLink.text}${dropdownIcon}
	</a>
	`;
	}