Header menu is not displayed on Rosetta sites without a custom menu

[SergeyBiryukov]

Background: comment:2:ticket:2618

On Rosetta sites that don't have a custom nav menu, the header menu falls back to wp_page_menu(), but the items are not displayed due to current styles in wp4.css. See an example on ​https://sah.wordpress.org/plugins/akismet/.

It's because wp_page_menu() has a bit different markup than wp_nav_menu() (it doesn't have an option to omit the container, see ​#WP33974):

<div id="wporg-header-menu" class="menu">
	<ul>
		...
	</ul>
</div>

vs.

<ul id="wporg-header-menu" class="menu">
	...
</ul>

The attached patch fixes the issue, see the screenshots. This doesn't explain why the Blog page is marked as current, but at least makes the header menu visible.

[obenland]

This appears to have been fixed with the switch to wporg-main.