[Bugs] #3623 Calculate UNSP: Calculate should save state for mode controls

[Sugar Labs Bugs]

#3623: Calculate should save state for mode controls
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    Reporter:  greenfeld                  |          Owner:  rwh                        
        Type:  defect                     |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  Calculate                  |        Version:  Unspecified                
    Severity:  Unspecified                |       Keywords:                             
Distribution:  OLPC                       |   Status_field:  Unconfirmed                
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 Calculate should save state in the Journal for the controls which can
 change how it processes input (degrees/radians) and how it shows output
 (scientific/engineering notation, number of digits, output base).

 These controls are currently reset to defaults whenever a Calculate
 journal entry is resumed.

 The answers shown in the history log do not appear to change on resume due
 to degrees/radian recalculation; but they do take the default format
 instead of the bases/precision used for output when originally calculating
 them.

 Seen in OLPC 12.1.0 os11/Calculate-40.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/3623>
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