Create a UserMenu pattern for NavBars on Desktop #212
Description
Is your feature request related to a problem? Please describe.
At the time of writing this issue we are trying to standardize the logged in navigation experience on Desktop. This includes having a UserAvatar be clickable and a dropdown menu with various links.
Describe the solution you'd like
These prototypes in Figma show how the UX should look like and since they share so many of the look & feel across services, we should create a pattern for it.
Additional context
thunderbird/appointment#1452 (comment)