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/core-js/internals/math-scale.js

@@ -0,0 +1,14 @@
+'use strict';
+// `Math.scale` method implementation
+// https://rwaldron.github.io/proposal-math-extensions/
+module.exports = function scale(x, inLow, inHigh, outLow, outHigh) {
+  var nx = +x;
+  var nInLow = +inLow;
+  var nInHigh = +inHigh;
+  var nOutLow = +outLow;
+  var nOutHigh = +outHigh;
+  // eslint-disable-next-line no-self-compare -- NaN check
+  if (nx !== nx || nInLow !== nInLow || nInHigh !== nInHigh || nOutLow !== nOutLow || nOutHigh !== nOutHigh) return NaN;
+  if (nx === Infinity || nx === -Infinity) return nx;
+  return (nx - nInLow) * (nOutHigh - nOutLow) / (nInHigh - nInLow) + nOutLow;
+};