[Bugs] #4114 Calculate UNSP: Touch OSK for alpha input

[Sugar Labs Bugs]

#4114: Touch OSK for alpha input
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    Reporter:  tonyforster                |          Owner:  rwh                        
        Type:  defect                     |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  Calculate                  |        Version:  Unspecified                
    Severity:  Unspecified                |       Keywords:                             
Distribution:  Unspecified                |   Status_field:  Unconfirmed                
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 Without a keyboard, functions like plot and help can't be used. Maybe add
 a button which can enable the OSK for alpha entry.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/4114>
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