Rename and clear bad code

src/navigation.rs

@@ -330,7 +330,7 @@ macro_rules! state_navigate_handle {
 }
 
 pub trait NavigatedPage<T> {
-    fn navigate(&self, message: &T) -> Option<Page>;
+    fn navigate(&mut self, message: &T) -> Option<Page>;
     fn navigated(&mut self);
     fn update(&mut self, message: T) -> Task<RootMessage>;
     fn view(&self) -> Element<'_, T>;