iris: fold render state into Ui

iris/examples/tabs/main.rs

@@ -24,16 +24,12 @@ impl DefaultAppState for Client {
         }
     }
 
-    fn window_event(
-        &mut self,
-        _: WindowEvent,
-        rsc: &mut DefaultRsc<Self>,
-        render: &mut UiRenderState,
-    ) {
+    fn window_event(&mut self, _: WindowEvent, rsc: &mut DefaultRsc<Self>) {
+        let render_state = rsc.ui.render_state();
         let new = format!(
             "widgets: {}\nactive: {}\nviews: {}",
             rsc.widgets().len(),
-            render.active_widgets(),
+            render_state.get().active_widgets(),
             self.ui_state.renderer.ui.view_count(),
         );
         if new != *rsc.widgets()[self.info].content {