[Bugs] #1341 UNSP: Sugar craches during undo for new .sugar environment

[SugarLabs Bugs]

#1341: Sugar craches during undo for new .sugar environment
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    Reporter:  alsroot                    |          Owner:  sayamindu                  
        Type:  defect                     |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  sugar                      |        Version:  0.85.x                     
    Severity:  Unspecified                |       Keywords:                             
Distribution:  Unspecified                |   Status_field:  Unconfirmed                
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 |TestCase|
 * remove all gconf options for desktop/sugar/peripherals/keyboard
 * open Keyboard control panel component
 * click Cancel button
 * sugar crashes due to None value for self._group_switch_option in
 Keyboard.undo()

 Also Keyboard doesn't handle initial values for self._klayouts properly.

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Ticket URL: <http://dev.sugarlabs.org/ticket/1341>
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