Use setTimeout() trick instead of Window.requestIdleCallback() (#3044)

Cargo.toml

@@ -164,6 +164,8 @@ redox_syscall = "0.3"
 package = "web-sys"
 version = "0.3.64"
 features = [
+    'AbortController',
+    'AbortSignal',
     'console',
     'CssStyleDeclaration',
     'Document',
@@ -179,6 +181,8 @@ features = [
     'IntersectionObserverEntry',
     'KeyboardEvent',
     'MediaQueryList',
+    'MessageChannel',
+    'MessagePort',
     'Node',
     'PageTransitionEvent',
     'PointerEvent',