Problem
The "Send email" button in theEmailConfirmationCTA flash banner is rendered in front of the NavItemPanel menu and therefore visible and clickable when the menu is open.

Steps to reproduce
- Create a new account or log in with an unconfirmed account
- Wait until the email confirmation cta appears
- Open a menu in the navigation
Proposed Solution
Setting z-index: 1 (or higher) for the EmailConfirmationCTA should solve the problem.
Note: Interestingly, setting position: static for EmailConfirmationCTA also technically fixes the problem.