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/graphemer/CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [1.3.0] - 2021-12-13
+
+### Added
+
+- Updated to include support for Unicode 14
+
+## [1.2.0] - 2021-01-29
+
+### Updated
+
+- Refactored to increase speed
+
+## [1.1.0] - 2020-09-14
+
+### Added
+
+- Updated to include support for Unicode 13
+
+## [1.0.0] - 2020-09-13
+
+- Forked from work by @JLHwung on original `Grapheme-Splitter` library: https://github.com/JLHwung/grapheme-splitter/tree/next
+- Converted to Typescript
+- Added development and build tooling