[Bugs] #1312 UNSP: Palette will fail to open if you have just 'scrubbed' over some number of icons quickly

[SugarLabs Bugs]

#1312: Palette will fail to open if you have just 'scrubbed' over some number of
icons quickly
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    Reporter:  garycmartin                |          Owner:  tomeu            
        Type:  defect                     |         Status:  new              
    Priority:  Unspecified by Maintainer  |      Milestone:  0.86             
   Component:  sugar                      |        Version:  Git as of bugdate
    Severity:  Unspecified                |       Keywords:                   
Distribution:  Unspecified                |   Status_field:  Unconfirmed      
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 I've been seeing the occasional random palette fail to open when mousing
 over button icons. It seems to happen for any palette, home icon ring,
 Frame activities tray, frame device, activity toolbars. Once a palette
 fails to open, you have to hover over a different palette, allow it to
 open, and then return to the palette that failed (it will now open
 correctly).

 To reproduce:
 1) open a few activities (eg, Log, Terminal Write)
 2) mouse to a corner to reveal the frame
 3) sweep the cursor back and forwards a few times over the top frame zoom
 views and open activity icons (move cursor quickly)
 4) stop cleanly on one of the icons, and wait for the palette to display
 5) if palette displays correctly, go to step 3 and try again

 You should see the palette fail to display after a few attempts. It's also
 reasonably easy to reproduce by sweeping the cursor over an arc of the
 home favourites view.

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Ticket URL: <http://dev.sugarlabs.org/ticket/1312>
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