message: remove 'params' from yaml
  This is a temporary fix in lieu of rewriting every details page.
diff: @@ -128,6 +128,10 @@ export class EditYAML extends SafetyFirst {
  this.doc = es.getDocument();
  }
  let yaml;
  + // TODO: (kans) this is because we spread the object into Details pages (but need to add other props too) :-/
  + obj = Object.assign({}, obj);
  + delete obj.params;
  +
  try {
  yaml = safeDump(obj);
  } catch (e) {
  