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/function-bind-native.js

@@ -0,0 +1,9 @@
+'use strict';
+var fails = require('../internals/fails');
+
+module.exports = !fails(function () {
+  // eslint-disable-next-line es/no-function-prototype-bind -- safe
+  var test = (function () { /* empty */ }).bind();
+  // eslint-disable-next-line no-prototype-builtins -- safe
+  return typeof test != 'function' || test.hasOwnProperty('prototype');
+});