URL updates

interface/src/utils/file.ts

@@ -0,0 +1,11 @@
+export const saveFile = (json: unknown, filename: string, extension: string) => {
+  const anchor = document.createElement('a');
+  anchor.href = URL.createObjectURL(
+    new Blob([JSON.stringify(json, null, 2)], {
+      type: 'text/plain'
+    })
+  );
+  anchor.download = 'emsesp_' + filename + extension;
+  anchor.click();
+  URL.revokeObjectURL(anchor.href);
+};