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/@babel/runtime/helpers/maybeArrayLike.js

@@ -0,0 +1,9 @@
+var arrayLikeToArray = require("./arrayLikeToArray.js");
+function _maybeArrayLike(r, a, e) {
+  if (a && !Array.isArray(a) && "number" == typeof a.length) {
+    var y = a.length;
+    return arrayLikeToArray(a, void 0 !== e && e < y ? e : y);
+  }
+  return r(a, e);
+}
+module.exports = _maybeArrayLike, module.exports.__esModule = true, module.exports["default"] = module.exports;