[Pidgin] #168: Handle "you have logged in somewhere else" errors smarter

[Pidgin]

#168: Handle "you have logged in somewhere else" errors smarter
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  Reporter:  seanegan      |       Owner:  rlaager
      Type:  defect        |      Status:  new    
  Priority:  minor         |   Milestone:  2.3.0  
 Component:  pidgin (gtk)  |     Version:  2.0    
Resolution:                |    Keywords:         
   Pending:  0             |  
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Comment (by resiak at soc.pidgin.im):

 (In [d714bc96cce032a651cf5885941018cb5bcdb4e9]) Restore error
 notifications on the buddy list after a restart.  Make the Ignore
 button on the signed in elsewhere notification clear the accounts' current
 errors so that they aren't around to be restored after restarts.

 References #168

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Ticket URL: </ticket/168#comment:17>
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