Make window size updater optional

src/context.rs

@@ -1004,8 +1004,8 @@ impl Plugin for KayakContextPlugin {
                 calculate_ui
                     .after(update_widgets_sys)
                     .in_base_set(CoreSet::PostUpdate),
-            )
-            .add_system(crate::window_size::update_window_size);
+            );
+            // .add_system(crate::window_size::update_window_size);
 
         // Register reflection types.
         // A bit annoying..
@@ -1029,6 +1029,8 @@ impl Plugin for KayakContextPlugin {
     }
 }
 
+pub use crate::window_size::update_window_size;
+
 fn calculate_ui(world: &mut World) {
     // dbg!("Calculating nodes!");