message: friendlier image url helper
diff: import { helper } from '@ember/component/helper';
  import { hubURL } from "@cardstack/plugin-utils/environment";
  -export function csImageUrl([imageOrFile]) {
  +export function csImageUrl(imageOrFile) {
  let id;
  if (imageOrFile.constructor.modelName === 'cardstack-file') {
  id = imageOrFile.get('id');
  @@ -11,4 +11,6 @@ export function csImageUrl([imageOrFile]) {
  return `${hubURL}/api/cardstack-files/${id}`;
  }
  -export default helper(csImageUrl);
  +export default helper(function([imageOrFile]) {
  + return csImageUrl(imageOrFile);
  +});
  