[Pidgin] #317: Enable "undo"

[Pidgin]

#317: Enable "undo"
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  Reporter:  asbjornu         |       Owner:  datallah
      Type:  enhancement      |      Status:  new     
  Priority:  minor            |   Milestone:          
 Component:  winpidgin (gtk)  |     Version:  2.0     
Resolution:                   |    Keywords:  undo    
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Comment (by seanegan):

 It would be neat if undo could be something done externally, like
 gtkspell, such that anyone can easily add it.

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Ticket URL: <http://developer.pidgin.im/ticket/317#comment:3>
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