Add indicator of unread content to window title when web UI is out of focus (#11560)

Fix #1288

app/javascript/mastodon/initial_state.js

@@ -23,5 +23,6 @@ export const forceSingleColumn = !getMeta('advanced_layout');
 export const useBlurhash = getMeta('use_blurhash');
 export const usePendingItems = getMeta('use_pending_items');
 export const showTrends = getMeta('trends');
+export const title = getMeta('title');
 
 export default initialState;