Function handler

js/main.js:1214–1226

(e)

  customMapSwatch.appendChild(thumb);

  const label = document.createElement('span');
  label.className = 'preset-label';
  label.textContent = entry.name;
  customMapSwatch.appendChild(label);

  customMapSwatch.title = entry.name;
  customMapRow.classList.remove('hidden');
}

function _hideCustomMapThumb() {
  if (!customMapRow) return;
  customMapRow.classList.add('hidden');
  if (customMapSwatch) customMapSwatch.innerHTML = '';
}

/** Promote the kept-aside custom map back to the active map. No defaults reset. */