Add a when and otherwise on every new choice

[lhein]

Its tedious to build a choice from zero. We should already offer the otherwise branch and a single when branch for a better user experience.

[stale[bot]]

🚨This issue has been automatically marked as stale because it has not had recent activity.🚨 If you are still interested in this issue, please, leave a comment stating its current status. Note that if no development resources has been allocated on it, you may need to search for alternative resources to complete it. It will be closed if no further activity occurs. Thank you for your contributions.