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/is-callable.js

@@ -0,0 +1,12 @@
+'use strict';
+// https://tc39.es/ecma262/#sec-IsHTMLDDA-internal-slot
+var documentAll = typeof document == 'object' && document.all;
+
+// `IsCallable` abstract operation
+// https://tc39.es/ecma262/#sec-iscallable
+// eslint-disable-next-line unicorn/no-typeof-undefined -- required for testing
+module.exports = typeof documentAll == 'undefined' && documentAll !== undefined ? function (argument) {
+  return typeof argument == 'function' || argument === documentAll;
+} : function (argument) {
+  return typeof argument == 'function';
+};