#8423 NORM Not Tri: The freeform view leaks an icon on every move

[Zarro Boogs per Child]

#8423: The freeform view leaks an icon on every move
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   Reporter:  bemasc       |       Owner:  marco        
       Type:  defect       |      Status:  new          
   Priority:  normal       |   Milestone:  Not Triaged  
  Component:  sugar        |     Version:  not specified
 Resolution:               |    Keywords:  relnote      
Next_action:  communicate  |    Verified:  0            
  Blockedby:  7579         |    Blocking:               
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Comment(by bemasc):

 I have attempted to fix this in the course of rewriting grid.py.  Please
 test the above patches.

 These patches also remove the only use of numpy in the shell, thus saving
 several megabytes of memory.

 I have attempted to reproduce the behavior of the previous grid.py as
 closely as possible, since I am not sure what the ideal desired behaviors
 are, and I find the structure of the drawing system extremely confusing.

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Ticket URL: <http://dev.laptop.org/ticket/8423#comment:4>
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