adding symbol to force utf-8 casting in Excel (#790)

Co-authored-by: Alfred Rubin <[email protected]>

Author: alfredorubin96

src/chart/ChartUtils.ts

@@ -172,7 +172,7 @@ export const downloadCSV = (rows) => {
     });
     csv += '\n';
   });
-  const file = new Blob([csv], { type: 'text/plain;charset=utf8' });
+  const file = new Blob([`\ufeff${  csv}`], { type: 'text/plain;charset=utf8' });
   element.href = URL.createObjectURL(file);
   element.download = 'table.csv';
   document.body.appendChild(element); // Required for this to work in FireFox