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/stable/url/can-parse.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/web.url');
+require('../../modules/web.url.can-parse');
+var path = require('../../internals/path');
+
+module.exports = path.URL.canParse;

node_modules/core-js/stable/url/index.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../web/url');
+
+module.exports = parent;

node_modules/core-js/stable/url/parse.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/web.url');
+require('../../modules/web.url.parse');
+var path = require('../../internals/path');
+
+module.exports = path.URL.parse;

node_modules/core-js/stable/url/to-json.js

@@ -0,0 +1,2 @@
+'use strict';
+require('../../modules/web.url.to-json');