message: bug: correctly close already opened modal when needed
  Fixes
diff: @@ -603,6 +603,8 @@ on('BTDC_gotMediaGalleryChirpHTML', (ev, data) => {
  const tweetMarkupString = modalHtml.replace('<div class="js-med-tweet med-tweet"></div>', `<div class="js-med-tweet med-tweet">${markup}</div>`);
  const tweetNode = secureDomify.parse(tweetMarkupString);
  + closeOpenModal();
  +
  openModal.appendChild(tweetNode);
  openModal.style.display = 'block';
  openModal.querySelector('img, iframe').onload = e => e.target.setAttribute('data-btd-loaded', 'true');
  