[Bugs] #1292 UNSP: Do not fail on immediate second palette openning for bottom icons

[SugarLabs Bugs]

#1292: Do not fail on immediate second palette openning for bottom icons
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    Reporter:  alsroot                    |          Owner:  erikos           
        Type:  defect                     |         Status:  new              
    Priority:  Unspecified by Maintainer  |      Milestone:  0.86             
   Component:  sugar-toolkit              |        Version:  Git as of bugdate
    Severity:  Unspecified                |       Keywords:                   
Distribution:  Unspecified                |   Status_field:  Unconfirmed      
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 |TestCase|
 * apply #1285 patch
 * open any button with second palette at bottom of the screen by right
 clicking(w/o waiting for second palette timeout)

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Ticket URL: <http://dev.sugarlabs.org/ticket/1292>
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