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.reflect.apply.js

@@ -0,0 +1,20 @@
+'use strict';
+var $ = require('../internals/export');
+var functionApply = require('../internals/function-apply');
+var aCallable = require('../internals/a-callable');
+var anObject = require('../internals/an-object');
+var fails = require('../internals/fails');
+
+// MS Edge argumentsList argument is optional
+var OPTIONAL_ARGUMENTS_LIST = !fails(function () {
+  // eslint-disable-next-line es/no-reflect -- required for testing
+  Reflect.apply(function () { /* empty */ });
+});
+
+// `Reflect.apply` method
+// https://tc39.es/ecma262/#sec-reflect.apply
+$({ target: 'Reflect', stat: true, forced: OPTIONAL_ARGUMENTS_LIST }, {
+  apply: function apply(target, thisArgument, argumentsList) {
+    return functionApply(aCallable(target), thisArgument, anObject(argumentsList));
+  }
+});