Admin bar edit actions submenu has icons, awkward indentation

[ryelle]

Screenshot

WordCamp site (broken)	WordPress Docs (correct)

I tracked this down to the admin bar customization in wporg-mu-plugins. The same code applies in both places, but the WordPress.org sites have some extra CSS to hide the icons & fixes the indentation. This is not loaded on individual WordCamp sites because it's bundled in with the global header CSS.

#wpadminbar .ab-sub-wrapper #wp-admin-bar-edit-actions-default .ab-item::before {
  content: "" !important;
}

This bit of CSS could probably be inlined in the admin-bar.php file, so it applies regardless of the global header block. The rest of the CSS in admin-bar.pcss updates the styles to match the global header, not necessary on WordCamp sites.