Profile pictures can now be uploaded for each individual user, both by the user and by the admin.
For a user to add or edit their profile picture, they simply click the profile icon in the top right corner of the user edit dialog:
Admin can add or edit the user profile picture via the “Add Person” or “Edit Person” dialog on Admin>Licenses:
A standard “Choose image” dialogue will appear, where you can upload an image and resize it to the required crop:
Uploaded images will then appear against the user, replacing the standard user icon.