Add Mode icon

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="24" height="24"><mask id="ipTAddMode0"><g fill="none" stroke="#fff" stroke-linecap="round" stroke-linejoin="round" stroke-miterlimit="10" stroke-width="4"><path fill="#555" d="m24.003 4l5.27 5.27h9.457v9.456l5.27 5.27l-5.27 5.278v9.456h-9.456L24.004 44l-5.278-5.27H9.27v-9.456L4 23.997l5.27-5.27V9.27h9.456L24.003 4Z"/><path d="M17 23.997h14M24.004 17v14"/></g></mask><path fill="currentColor" d="M0 0h48v48H0z" mask="url(#ipTAddMode0)"/></svg>