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/internals/native-raw-json.js

@@ -0,0 +1,11 @@
+'use strict';
+/* eslint-disable es/no-json -- safe */
+var fails = require('../internals/fails');
+
+module.exports = !fails(function () {
+  var unsafeInt = '9007199254740993';
+  // eslint-disable-next-line es/no-nonstandard-json-properties -- feature detection
+  var raw = JSON.rawJSON(unsafeInt);
+  // eslint-disable-next-line es/no-nonstandard-json-properties -- feature detection
+  return !JSON.isRawJSON(raw) || JSON.stringify(raw) !== unsafeInt;
+});