#2714 BLOC Trial-3: Adopt chat activity to sugar.graphics cleanup

[Zarro Boogs per Child]

#2714: Adopt chat activity to sugar.graphics cleanup
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 Reporter:  Simon          |       Owner:  morgs  
     Type:  defect         |      Status:  new    
 Priority:  blocker        |   Milestone:  Trial-3
Component:  chat-activity  |     Version:         
 Keywords:                 |    Verified:  0      
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 - roundbox has been renamed to canvasroundbox
  - units.py units are specified in pixels now (As far as i understood).
 units.py has been dropped.

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Ticket URL: <https://dev.laptop.org/ticket/2714>
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