Create a site with 2 users enrolled in the same course
Log in as user 1
Open the message drawer and search for user 2
CONFIRM that user 2 shows up in the non-contact list and their name is bold
Add user 2 as a contact
Log in as user 2 and approve the contact request
View the list of contacts in the message drawer
CONFIRM that user 1's name is bold in the list
Repeat steps 3 - 8 (except for the contact request approval) on the Clean theme (or Boost, if you started on Clean).