888 Make Apply_variant function more generic and fix issue with default value#904

HenrZu merged 13 commits intomainSciCompMod/memilio:mainfrom

888-Correct-apply_b161-for-default-case-and-make-more-genericSciCompMod/memilio:888-Correct-apply_b161-for-default-case-and-make-more-genericCopy head branch name to clipboard