[Bugs] #3204 sugar UNSP: Set the Sugar cursor in a non racy way

[Sugar Labs Bugs]

#3204: Set the Sugar cursor in a non racy way
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    Reporter:  erikos                     |          Owner:  erikos           
        Type:  defect                     |         Status:  assigned         
    Priority:  Unspecified by Maintainer  |      Milestone:  1.0              
   Component:  sugar                      |        Version:  Git as of bugdate
    Severity:  Major                      |       Keywords:                   
Distribution:  Unspecified                |   Status_field:  New              
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Comment(by dnarvaez):

 My patchset doesn't apply after not being reviewed for months. Redoing it
 all would take some point, but perhaps it's easier to apply just this bit.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/3204#comment:7>
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