Added user avatar to header
What does this MR do?
Adds the users avatar to the header with a dropdown for profile & sign out.
What are the relevant issue numbers?
Closes #18543 (closed)
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Adds the users avatar to the header with a dropdown for profile & sign out.
Closes #18543 (closed)