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/modules/es.object.define-property.js

@@ -0,0 +1,11 @@
+'use strict';
+var $ = require('../internals/export');
+var DESCRIPTORS = require('../internals/descriptors');
+var defineProperty = require('../internals/object-define-property').f;
+
+// `Object.defineProperty` method
+// https://tc39.es/ecma262/#sec-object.defineproperty
+// eslint-disable-next-line es/no-object-defineproperty -- safe
+$({ target: 'Object', stat: true, forced: Object.defineProperty !== defineProperty, sham: !DESCRIPTORS }, {
+  defineProperty: defineProperty
+});