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/_basePick.js

@@ -0,0 +1,19 @@
+var basePickBy = require('./_basePickBy'),
+    hasIn = require('./hasIn');
+
+/**
+ * The base implementation of `_.pick` without support for individual
+ * property identifiers.
+ *
+ * @private
+ * @param {Object} object The source object.
+ * @param {string[]} paths The property paths to pick.
+ * @returns {Object} Returns the new object.
+ */
+function basePick(object, paths) {
+  return basePickBy(object, paths, function(value, path) {
+    return hasIn(object, path);
+  });
+}
+
+module.exports = basePick;