Experiment with call syntax only working for copy types

examples/control_focus.rs

@@ -12,7 +12,7 @@ fn app() -> Element {
 
     use_future(move || async move {
         let mut focused = 0;
-        if *running() {
+        if running() {
             loop {
                 tokio::time::sleep(std::time::Duration::from_millis(10)).await;
                 if let Some(element) = elements.with(|f| f.get(focused).cloned()) {