add signals where appropriate

src/form.rs

@@ -32,6 +32,7 @@ impl<FD: FormToolData> FormValidator<FD> {
 ///
 /// With this, you can render the form, get the form data, or get
 /// a validator for the data.
+#[derive(Clone)]
 pub struct Form<FD: FormToolData> {
     /// The form data signal.
     pub fd: RwSignal<FD>,