Health warning thresholds are 50% and 25% - default choice

Earlier Health Warnings with readme and 30%, 33%, 40%, 50%, 60%, 67% or 80% choice.

Health warning thresholds are 17% and 33%.

Health warning thresholds are 20% and 40%.

Health warning thresholds are 30% and 60%.

Health warning thresholds are 33% and 67%.

Health warning thresholds are 40% and 80%.