[Trac #554] activities in donut shouldn't move around the wedges on activity launch (w/patch)

[Zarro Boogs per Child]

#554: activities in donut shouldn't move around the wedges on activity launch
(w/patch)
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 Reporter:  ywwg    |       Owner:  blizzard
     Type:  defect  |      Status:  new     
 Priority:  normal  |   Milestone:  BTest-2 
Component:  distro  |    Keywords:          
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 Right now, when a new activity is launched, the icons shuffle around the
 donut because they are stored in a dictionary, not a list (they seem to
 sort by ID).

 This is a patch that fixes this.  Now activities are simply appended to
 the donut in a list.

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Ticket URL: <http://dev.laptop.org/ticket/554>
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