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/humanize-ms/index.js

@@ -0,0 +1,24 @@
+/*!
+ * humanize-ms - index.js
+ * Copyright(c) 2014 dead_horse <dead_horse@qq.com>
+ * MIT Licensed
+ */
+
+'use strict';
+
+/**
+ * Module dependencies.
+ */
+
+var util = require('util');
+var ms = require('ms');
+
+module.exports = function (t) {
+  if (typeof t === 'number') return t;
+  var r = ms(t);
+  if (r === undefined) {
+    var err = new Error(util.format('humanize-ms(%j) result undefined', t));
+    console.warn(err.stack);
+  }
+  return r;
+};