Auto un/select expected values in patient builder

### Story ###
- https://www.pivotaltracker.com/story/show/73827152

### Notes ###
- included fix for CV measures having only one MSRPOPL for patient-based measure
- included update to OBSERV_UNIT toggle buttons to be better aligned with the UI
- added jasmine tests for IPP, DENOM, NUMER auto selections
- added <code>selectPopulations</code> method that is triggered when a population's expected value is blurred, which enforces the following rules
  - if using non-episode of care and non-CV or patient-based CV measures
    - select IPP -> handle STRAT if it exists (untested)
    - select DENOM or MSRPOPL -> handle IPP
    - select NUMER or DENEX or DENEXCEP -> handle DENOM
    - unselect STRAT -> handle IPP
    - unselect IPP -> handle DENOM and MSRPOPL (if CV measure)
    - unselect DENOM or MSRPOPL -> handle NUMER and DENEX and DENEXCEP
  - else if using Episode of care measures
    - increment IPP -> handle STRAT if it exists and is lesser (untested)
    - increment DENOM or MSRPOPL -> handle IPP if it is lesser
    - increment NUMER or DENEX or DENEXCEP -> handle DENOM if it is lesser
    - decrement STRAT -> handle IPP if it is greater
    - decrement IPP -> handle DENOM and MSRPOPL (if CV measure) if they are greater
    - decrement DENOM or MSRPOPL -> handle NUMER and DENEX and DENEXCEP if they are greater