Allow leaving idiomatic undefined

js/apps/system/_api/foxx/APP/index.js

@@ -407,7 +407,7 @@ instanceRouter.post('/tests', (req, res) => {
 })
 .queryParam('filter', joi.string().allow("").optional())
 .queryParam('reporter', joi.only(...Object.keys(reporters)).optional())
-.queryParam('idiomatic', schemas.flag.default(false))
+.queryParam('idiomatic', schemas.flag.optional())
 .response(200, ['json', LDJSON, 'xml', 'text']);
 
 instanceRouter.post('/download', (req, res) => {

js/apps/system/_api/foxx/APP/schemas.js

@@ -7,7 +7,7 @@ exports.mount = joi.string().regex(/(?:\/[-_0-9a-z]+)+/i).required();
 exports.flag = joi.alternatives().try(
   joi.boolean(),
   joi.number().integer().min(0).max(1)
-).default(false);
+);
 
 exports.shortInfo = joi.object({
   mount: exports.mount,