WIP: Solve issues with enableWhenExpression by re-writing it into calculat…

[ruscoder]

…ed + enableWhen

[ruscoder]

What actually happens:

item: 
  - linkId: first
     type: string
   - linkId: second
      enableWhenExpression:
        expression: %resource.where(linkId='first').answer.valueString = 'test'

item: 
  - linkId: first
     type: string
   - linkId: second-calculated
      hidden: true
      calculatedExpression:
        expression: %resource.where(linkId='first').answer.valueString = 'test'
   - linkId: second
      enableWhen:
        - question: second-calculated
           answer:
              valueBoolean: true