Online User Alerts

Set each OUA notification (in the top row) to check for a previous instance, and clear it if present, to prevent 5-20 separate notifications for a single user piling up in the top area. (Alternatively, simply suppress further notifications while a previous one still exists unclicked/uncleared.) Add column to Users/Online Alerts window, "Last Logged On/Off" showing last date/time their status changed from offline to online, while that user is online, and change it to last date/time status changed from online to offline, while they are offline. I don't care if this is retrieved from the server (i.e. complete) or stored locally in the client (either session-only, or continuously over multiple sessions.) I usually stay on 24/7 so it would work out the same for me.