fix(editor): Respect user's dark-mode preference even before the application is loaded (no-changelog) (#11530)

packages/editor-ui/index.html

@@ -5,6 +5,7 @@
 		<meta http-equiv="X-UA-Compatible" content="IE=edge" />
 		<meta name="viewport" content="width=device-width,initial-scale=1.0" />
 		<link rel="icon" href="/favicon.ico" />
+		<style>@media (prefers-color-scheme: dark) { body { background-color: rgb(45, 46, 46) } }</style>
 		<script type="text/javascript">
 			window.BASE_PATH = '/{{BASE_PATH}}/';
 			window.REST_ENDPOINT = '{{REST_ENDPOINT}}';