Refreshing friendlist?

By far the most annoying feature of the client is that it show friend statuses incorrectly. Like from my 10 friends, 3 are online, one is in game for 200 minutes, one is -:-, the other is somehow uneligable to join me when I try to invite, then, about 10 min of waiting the client refreshes and none is online. Couldn't there be a refresh button for the friend list? Between "SOCIAL" and "Add Friend" button maybe.
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