removed default plotting options and validation on plotting options
Default null value added for Programs in cost-coverage-outcome
Merge branch 'develop' into fix/306-2-fix-plotting-of-default-ccocs
added placeholders and merged with develop
readjusted control elements as specified
Merge pull request #179 from StarterSquad/fix/306-2-fix-plotting-of-default-ccocs

removed default plotting options and validation on plotting options