Completely hide toots matched by “irreversible” filters even if they got to the client (#11113)

Fixes #11090

app/javascript/mastodon/actions/notifications.js

@@ -48,9 +48,14 @@ export function updateNotifications(notification, intlMessages, intlLocale) {
     let filtered = false;
 
     if (notification.type === 'mention') {
+      const dropRegex   = regexFromFilters(filters.filter(filter => filter.get('irreversible')));
       const regex       = regexFromFilters(filters);
       const searchIndex = notification.status.spoiler_text + '\n' + unescapeHTML(notification.status.content);
 
+      if (dropRegex && dropRegex.test(searchIndex)) {
+        return;
+      }
+
       filtered = regex && regex.test(searchIndex);
     }