Description

Related to #5417.

Extended header variant has menu items that don't align to its parent menu.

Steps to reproduce the issue

1. Megamenu on desktop preview →
   1. Click to expand
   2. Child items should align with logo
2. Megamenu extended preview →
   1. Click to expand
   2. Child items should align with parent link

Additional information [optional]

Regular dropdowns were fixed in #5418.