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/level-codec/package.json

@@ -0,0 +1,37 @@
+{
+  "name": "level-codec",
+  "version": "9.0.2",
+  "description": "Encode keys, values and range options, with built-in or custom encodings",
+  "license": "MIT",
+  "main": "index.js",
+  "scripts": {
+    "test": "standard && hallmark && nyc tape test/*.js",
+    "coverage": "nyc report --reporter=text-lcov | coveralls",
+    "hallmark": "hallmark --fix",
+    "dependency-check": "dependency-check . test/*.js",
+    "prepublishOnly": "npm run dependency-check"
+  },
+  "dependencies": {
+    "buffer": "^5.6.0"
+  },
+  "devDependencies": {
+    "coveralls": "^3.0.2",
+    "dependency-check": "^3.3.0",
+    "hallmark": "^2.0.0",
+    "level-community": "^3.0.0",
+    "nyc": "^14.0.0",
+    "standard": "^14.0.0",
+    "tape": "^4.10.0"
+  },
+  "hallmark": {
+    "community": "level-community"
+  },
+  "repository": "Level/codec",
+  "homepage": "https://github.com/Level/codec",
+  "keywords": [
+    "level"
+  ],
+  "engines": {
+    "node": ">=6"
+  }
+}