[Bugs] #4133 sugar-toolkit-gtk3 IMME: Gtk: some widgets do receive a GDK_CROSSING_UNGRAB leave event when tapped

[Sugar Labs Bugs]

#4133: Gtk: some widgets do receive a GDK_CROSSING_UNGRAB leave event when tapped
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    Reporter:  erikos              |          Owner:  garnacho
        Type:  defect              |         Status:  assigned
    Priority:  Immediate           |      Milestone:  0.98    
   Component:  sugar-toolkit-gtk3  |        Version:  0.97.x  
    Severity:  Blocker             |       Keywords:  upstream
Distribution:  OLPC                |   Status_field:  Assigned
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Comment(by garnacho):

 Some further investigation revealed that the Xorg fix was indirectly
 fixing this through other broken behavior, as pointed out in
 https://bugs.freedesktop.org/show_bug.cgi?id=56558#c3 , I'm attaching a
 tentative GDK patch to improve the situation here, more testing is due
 though

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Ticket URL: <http://bugs.sugarlabs.org/ticket/4133#comment:6>
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