ChatMessageList: fix pagination

app/soapbox/hooks/useRefEventHandler.ts

@@ -0,0 +1,9 @@
+import { useRef } from 'react';
+
+/** Hook that allows using useState values in event handlers. */
+// https://stackoverflow.com/a/64770671/8811886
+export const useRefEventHandler = (fn: (...params: any) => void) => {
+  const ref = useRef(fn);
+  ref.current = fn;
+  return ref;
+};