Add scoped overlay hosts

app-rust/examples/phone.rs

@@ -93,7 +93,7 @@ impl DefaultAppState for Client {
                     .pad(dp(16))
                     .add_strong(rsc)
                     .any();
-                ui_state.set_root(text);
+                ui_state.set_root(rsc, text);
                 None
             }
         };