message: Added: open shut toggle button for parameter object.
diff: border: 1px solid var(--color-basic-lightGray);
  border-radius: 4px;
  }
  +
  +.Parameters > .Parameter {
  + margin-bottom: 8px;
  +}
  +
  +.Parameters > .Parameter:last-child {
  + margin-bottom: 0;
  +}
  