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/iterate-simple.js

@@ -0,0 +1,12 @@
+'use strict';
+var call = require('../internals/function-call');
+
+module.exports = function (record, fn, ITERATOR_INSTEAD_OF_RECORD) {
+  var iterator = ITERATOR_INSTEAD_OF_RECORD ? record : record.iterator;
+  var next = record.next;
+  var step, result;
+  while (!(step = call(next, iterator)).done) {
+    result = fn(step.value);
+    if (result !== undefined) return result;
+  }
+};