Twenty Twenty: Desktop Expanded Menu is not right-aligned or full-height

[westonruter]

Bug Description

Menus assigned to the “Desktop Expanded Menu” location do not open right-aligned or full-height in AMP.

Expected Behaviour

The desktop expanded menu should open being positioned to the right (when dir=ltr) and take up the full viewport height.

Steps to reproduce

0. Activate Twenty Twenty
1. Assign a menu to the “Desktop Expanded Menu” location.
2. View the AMP page.
3. Click the menu button.
4. See incorrect position compared to non-AMP page

Screenshots

---

Do not alter or remove anything below. The following sections will be managed by moderators only.

Acceptance criteria

Implementation brief

QA testing instructions

Demo

Changelog entry

[csossi]

Verified in QA