[Bugs] #2225 UNSP: sliderule should support more scales and combinations

[Sugar Labs Bugs]

#2225: sliderule should support more scales and combinations
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    Reporter:  walter                     |          Owner:  walter                     
        Type:  enhancement                |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  untriaged                  |        Version:  Unspecified                
    Severity:  Unspecified                |       Keywords:  sliderule                  
Distribution:  Unspecified                |   Status_field:  Unconfirmed                
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Comment(by tonyforster):

 Maybe keep existing layouts, C,CI,A,L but add custom layout where you can
 chose any 2 scales from a list and there is no result text? Add
 S,T,LL1,LL2,LL3,K,P scales to this list.
 Add markers for pi and e. (my sliderule only marks pi but I cant see the
 harm in marking e)
 Move the L scale to the left of the toolbar so you start with addition and
 move progressively up to complexity.
 This activity would benefit from a tute or lesson plan, starting with
 instruction and moving into challenges.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/2225#comment:4>
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