[Bugs] #701 UNSP: Let user upgrade system activity from .xo

[SugarLabs Bugs]

#701: Let user upgrade system activity from .xo
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    Reporter:  alsroot                    |          Owner:  tomeu      
        Type:  defect                     |         Status:  reopened   
    Priority:  Unspecified by Maintainer  |      Milestone:  0.86       
   Component:  sugar                      |        Version:  0.85.x     
    Severity:  Critical                   |     Resolution:             
    Keywords:  r?                         |   Distribution:  Unspecified
Status_field:  Unconfirmed                |  
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Changes (by alsroot):

 * cc: r- (removed)
  * keywords:  => r?


Comment:

 two last patches let users upgrade activities that were installed to non
 ~/Activities directory

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Ticket URL: <http://dev.sugarlabs.org/ticket/701#comment:7>
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