Clean up shared UI runtime state

examples/task.rs

@@ -2,18 +2,18 @@ use iris::prelude::*;
 use std::time::Duration;
 
 fn main() {
-    DefaultApp::<State>::run();
+    DesktopApp::<State>::run();
 }
 
-#[derive(DefaultUiState)]
+#[derive(DesktopUiState)]
 struct State {
-    ui_state: DefaultUiState,
+    ui_state: DesktopUiState,
 }
 
-impl DefaultAppState for State {
+impl DesktopAppState for State {
     fn new(
-        mut ui_state: DefaultUiState,
-        rsc: &mut DefaultRsc<Self>,
+        mut ui_state: DesktopUiState,
+        rsc: &mut DesktopRsc<Self>,
         _: Proxy<Self::Event>,
     ) -> Self {
         let rect = rect(PaintId::RED).add(rsc);