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