[Pidgin] #5587: add config for mailer application

[Pidgin]

#5587: add config for mailer application
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Reporter:  imi1984  |       Owner:  lschiere    
    Type:  defect   |      Status:  new         
Priority:  minor    |   Component:  unclassified
 Version:  2.4.1    |    Keywords:              
 Pending:  0        |  
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 Hello, as you have a config for browser, you should have a config for a
 mailer app, so clicking an email would pop up my favourite mailer app.

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Ticket URL: <http://developer.pidgin.im/ticket/5587>
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