md extension

const MdExtensionIcon = (props) => (
  <svg 
    xmlns="http://www.w3.org/2000/svg" 
    viewBox="0 0 24 24" 
    width="24"
    height="24"
    fill="none" 
    stroke="currentColor" 
    strokeWidth="2" 
    strokeLinecap="round" 
    strokeLinejoin="round" 
    {...props}
  >
    <path d="M0 0h24v24H0V0z" fill="none"/><path d="M10.5 4.5c.28 0 .5.22.5.5v2h6v6h2c.28 0 .5.22.5.5s-.22.5-.5.5h-2v6h-2.12c-.68-1.75-2.39-3-4.38-3s-3.7 1.25-4.38 3H4v-2.12c1.75-.68 3-2.39 3-4.38 0-1.99-1.24-3.7-2.99-4.38L4 7h6V5c0-.28.22-.5.5-.5m0-2C9.12 2.5 8 3.62 8 5H4c-1.1 0-1.99.9-1.99 2v3.8h.29c1.49 0 2.7 1.21 2.7 2.7s-1.21 2.7-2.7 2.7H2V20c0 1.1.9 2 2 2h3.8v-.3c0-1.49 1.21-2.7 2.7-2.7s2.7 1.21 2.7 2.7v.3H17c1.1 0 2-.9 2-2v-4c1.38 0 2.5-1.12 2.5-2.5S20.38 11 19 11V7c0-1.1-.9-2-2-2h-4c0-1.38-1.12-2.5-2.5-2.5z"/>
  </svg>
);