[Pidgin] #521: Make tray icon widget available to plugins

[Pidgin]

#521: Make tray icon widget available to plugins
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 Reporter:  jwendell      |       Type:  patch
   Status:  new           |   Priority:  minor
Component:  pidgin (gtk)  |    Version:  2.0  
 Keywords:                |    Pending:  0    
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 This is an updated version of patch attached in SF.net bug tracker.
 (https://sourceforge.net/tracker/?func=detail&atid=300235&aid=1636037&group_id=235)

 With this patch, the tray icon object becomes available to everyone,
 including any plugin.

 As a example, i have patched gaim-libnotify plugin to point notification
 into gaim status icon.

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Ticket URL: <http://developer.pidgin.im/ticket/521>
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