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/lodash/_isLaziable.js

@@ -0,0 +1,28 @@
+var LazyWrapper = require('./_LazyWrapper'),
+    getData = require('./_getData'),
+    getFuncName = require('./_getFuncName'),
+    lodash = require('./wrapperLodash');
+
+/**
+ * Checks if `func` has a lazy counterpart.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
+ *  else `false`.
+ */
+function isLaziable(func) {
+  var funcName = getFuncName(func),
+      other = lodash[funcName];
+
+  if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
+    return false;
+  }
+  if (func === other) {
+    return true;
+  }
+  var data = getData(other);
+  return !!data && func === data[0];
+}
+
+module.exports = isLaziable;