Fix big grid crashing due to missing React import

by fixing the cause rather than the symptom: this upgrades the code to use the new, recommended JSX transform mode of React 17+, which no longer requires you to import React manually just to write JSX.

src/analytics/AnalyticsNotice.tsx

@@ -1,4 +1,4 @@
-import React, { FC } from "react";
+import { FC } from "react";
 import { Trans } from "react-i18next";
 
 import { Link } from "../typography/Typography";