[Trac #575] Better key bindings for the sugar shell

[Zarro Boogs per Child]

#575: Better key bindings for the sugar shell
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 Reporter:  marco       |        Owner:  dcbw   
     Type:  defect      |       Status:  new    
 Priority:  normal      |    Milestone:  BTest-2
Component:  sugar       |   Resolution:         
 Keywords:  sugar-love  |  
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Comment (by marco):

 "Toggle chat visibility" should really be "Toggle overlay visibility". We
 should choose the keybinding according to the right definition.

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Ticket URL: <http://dev.laptop.org/ticket/575#comment:7>
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