[Pidgin] #7070: Restore conversation windows when restarting from a crash

[Pidgin]

#7070: Restore conversation windows when restarting from a crash
----------------------------+-----------------------------------------------
Reporter:  AaronCompNetSys  |        Type:  enhancement               
  Status:  new              |   Component:  pidgin (gtk)              
 Version:  2.5.1            |    Keywords:  crash missed conversations
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 If Pidgin crashes with conversation windows open, when it is relaunched,
 there is no automatic way to see if there were messages that were lost at
 time of crash.

 Example solution: log all open conversation window's IDs to disk by
 contact name and re-pop them on a restart.  Allow "Enhanced_History"
 plugin to handle retrieving the lost message from the disk, if enabled.

 Example situation: where this is needed by developers/users running buggy
 plugins or such where this happens in sequence. [[BR]]
 1) Lock windows workstation [[BR]]
 2) Inbound message [[BR]]
 3) Inactive timeout causes "Status" change and Pidgin crash for whatever
 reason [[BR]]
 4) Return to workstation and restart Pidgin - noticing there was a orange
 "New Message" system tray. [[BR]]
 5) grep for missed message on disk[[BR]]

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Ticket URL: <http://developer.pidgin.im/ticket/7070>
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