[Pidgin] #17295: Presence/alias for non-buddies not shown

[Pidgin]

#17295: Presence/alias for non-buddies not shown
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 Reporter:  dwmw2   |       Owner:  EionRobb
     Type:  defect  |      Status:  new
Milestone:          |   Component:  unclassified
  Version:  2.13.0  |  Resolution:
 Keywords:          |
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Comment (by dwmw2):

 That one adds the `get_cb_alias()` method to the PRPL. There's a separate
 patch to make Pidgin actually use the alias from the `PurpleConvChatBuddy`
 instead of making it up for itself, but that's simple enough.

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Ticket URL: <https://developer.pidgin.im/ticket/17295#comment:4>
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