[Pidgin] #15645: Report failed messages deliveries in conversation window

[Pidgin]

#15645: Report failed messages deliveries in conversation window
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 Reporter:  hobarrera    |      Owner:  rekkanoryo
     Type:  enhancement  |     Status:  new
Milestone:               |  Component:  unclassified
  Version:  2.10.7       |   Keywords:
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 When a message cannot be delivered for whatever reason, pidgin shows a
 popup notifying the user of this.
 There's a couple of issues with this:

  - It's rather intrusive.
  - The conversation log does not reflect this. When reviewing the log,
 there's no way to tell if the message was delivered or not.

 I belive  that it would be nice if pidgin could report the error in the
 conversation window - probaby with formatting similar to what the ones
 shown by VoiceVideo or the "Buddy State Notification" plugin.

 This would remove the rather intruvise error window, and help the logs
 actually reflect the way the conversation took place. It might also allow
 cleaning up some code (that particular dialog; since I haven't seen it
 used elsewhere).

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Ticket URL: <https://developer.pidgin.im/ticket/15645>
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