Hide admin username

Thanks again for the tremendous effort you all are putting into this plugin. Couple things to look at. There are several instances where the admin username is exposed on the site e.g. (Assigned as group leader or creating photo album) lowering the effectiveness of site security which is hardened when the admin username is not visible. It would be preferable to use the display name throughout the plugin for all users or at minimum provide a way to hide the admin user.