fix: overscroll behaviour on feed (#4433)

Author: rebelchris

packages/webapp/pages/feeds/[slugOrId]/edit.tsx

@@ -33,6 +33,14 @@ const EditFeedPage = (): ReactElement => {
 
   const isFeedEditRestricted = !isPlus && feed?.node.type === FeedType.Custom;
 
+  useEffect(() => {
+    document.body.classList.add('hidden-scrollbar');
+
+    return () => {
+      document.body.classList.remove('hidden-scrollbar');
+    };
+  }, []);
+
   useEffect(() => {
     if (isFeedEditRestricted) {
       router?.replace(webappUrl);