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/_baseTrim.js

@@ -0,0 +1,19 @@
+var trimmedEndIndex = require('./_trimmedEndIndex');
+
+/** Used to match leading whitespace. */
+var reTrimStart = /^\s+/;
+
+/**
+ * The base implementation of `_.trim`.
+ *
+ * @private
+ * @param {string} string The string to trim.
+ * @returns {string} Returns the trimmed string.
+ */
+function baseTrim(string) {
+  return string
+    ? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, '')
+    : string;
+}
+
+module.exports = baseTrim;