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.math.cbrt.js

@@ -0,0 +1,15 @@
+'use strict';
+var $ = require('../internals/export');
+var sign = require('../internals/math-sign');
+
+var abs = Math.abs;
+var pow = Math.pow;
+
+// `Math.cbrt` method
+// https://tc39.es/ecma262/#sec-math.cbrt
+$({ target: 'Math', stat: true }, {
+  cbrt: function cbrt(x) {
+    var n = +x;
+    return sign(n) * pow(abs(n), 1 / 3);
+  }
+});