FRE-600: Fix code review blockers

- Consolidated duplicate UndoManagers to single instance
- Fixed connection promise to only resolve on 'connected' status
- Fixed WebSocketProvider import (WebsocketProvider)
- Added proper doc.destroy() cleanup
- Renamed isPresenceInitialized property to avoid conflict

Co-Authored-By: Paperclip <noreply@paperclip.ing>

node_modules/core-js/web/url-search-params.js

@@ -0,0 +1,8 @@
+'use strict';
+require('../modules/web.url-search-params');
+require('../modules/web.url-search-params.delete');
+require('../modules/web.url-search-params.has');
+require('../modules/web.url-search-params.size');
+var path = require('../internals/path');
+
+module.exports = path.URLSearchParams;