v3: minor visual fixes

src/components/NewPlaylistForm.tsx

@@ -15,7 +15,7 @@ export function NewPlaylistForm(
   {
     onCreated,
     toggleLabel,
-    toggleClassName = "new-playlist-toggle",
+    toggleClassName = "new-item-toggle",
   }: NewPlaylistFormProps,
 ) {
   const [open, setOpen] = useState(false);

src/components/PlaylistMembershipPanel.tsx

@@ -74,7 +74,7 @@ export function PlaylistMembershipPanel({
         : (
           <button
             type="button"
-            className="modal-new-playlist-toggle"
+            className="modal-new-item-toggle"
             onClick={() => setShowNewForm(true)}
           >
             <Trans>+ New playlist</Trans>