API ToggleFriendsFrame

Opens/closes the friends pane. ToggleFriendsFrame([tabIndex])

Arguments

 * tabIndex : number (optional) - picks a specific tab in the friends frame. If the friends frame was already open, this closes the frame.
 * 1 = friends tab
 * 2 = who tab
 * 3 = guild tab
 * 4 = raid tab
 * default = last open tab