[Bugs] #3997 Browse UNSP: use long-press signal to invoke Palette

[Sugar Labs Bugs]

#3997: use long-press signal to invoke Palette
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    Reporter:  erikos                     |          Owner:  erikos  
        Type:  task                       |         Status:  new     
    Priority:  Unspecified by Maintainer  |      Milestone:  0.98    
   Component:  Browse                     |        Version:  0.97.x  
    Severity:  Major                      |       Keywords:          
Distribution:  OLPC                       |   Status_field:  Assigned
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 should be the same as right click

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Ticket URL: <http://bugs.sugarlabs.org/ticket/3997>
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