[Glitch] Use the new JSX transform everywhere

Port 8f66126b10 to glitch-soc

app/javascript/flavours/glitch/components/timeline_hint.tsx

@@ -1,4 +1,4 @@
-import React from 'react';
+import * as React from 'react';
 
 import { FormattedMessage } from 'react-intl';