Function medianPush

src/content/Backgrounds/GridScan/GridScan.jsx:870–873

(buf, v, maxLen)

}

function medianPush(buf, v, maxLen) {
  buf.push(v);
  if (buf.length > maxLen) buf.shift();
}

function median(buf) {
  if (buf.length === 0) return 0;