[Pidgin] #231: Add group for offline buddies

[Pidgin]

#231: Add group for offline buddies
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 Reporter:  rageboy       |       Type:  defect
   Status:  new           |   Priority:  minor 
Component:  pidgin (gtk)  |    Version:  2.0   
 Keywords:                |  
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 Summarize offline buddies in a separate group that can be expanded and
 collapsed instead of having "show offline buddies" menu option.

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Ticket URL: <http://developer.pidgin.im/ticket/231>
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