"none" term

[cturbelin]

case-editor-tools/src/surveys/survey-engine-expressions.ts

Line 526 in 228cf1f

none: singleChoiceOnlyOtherOptionSelected,

The "none" term used to refer to the expression "any response except these ones" is a little bit confusing because it can also means no response at all (so it's not really intuitive of what the operator really do). I suggest to use a more specific term, maybe add an alias like "except" or "otherThan" or rename it to "noneOf" ?