message: Update BtnGroup class
  Fixes
diff: @@ -6,7 +6,7 @@ export const groupButtons = (buttons: Element[]) => {
  // Ensure every button has this class
  for (let button of buttons) {
  if (!button.matches('.btn')) {
  - button.classList.add('BtnGroup-form');
  + button.classList.add('BtnGroup-parent');
  button = button.querySelector('.btn');
  }
  