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/pngjs/lib/crc.js

@@ -0,0 +1,40 @@
+"use strict";
+
+let crcTable = [];
+
+(function () {
+  for (let i = 0; i < 256; i++) {
+    let currentCrc = i;
+    for (let j = 0; j < 8; j++) {
+      if (currentCrc & 1) {
+        currentCrc = 0xedb88320 ^ (currentCrc >>> 1);
+      } else {
+        currentCrc = currentCrc >>> 1;
+      }
+    }
+    crcTable[i] = currentCrc;
+  }
+})();
+
+let CrcCalculator = (module.exports = function () {
+  this._crc = -1;
+});
+
+CrcCalculator.prototype.write = function (data) {
+  for (let i = 0; i < data.length; i++) {
+    this._crc = crcTable[(this._crc ^ data[i]) & 0xff] ^ (this._crc >>> 8);
+  }
+  return true;
+};
+
+CrcCalculator.prototype.crc32 = function () {
+  return this._crc ^ -1;
+};
+
+CrcCalculator.crc32 = function (buf) {
+  let crc = -1;
+  for (let i = 0; i < buf.length; i++) {
+    crc = crcTable[(crc ^ buf[i]) & 0xff] ^ (crc >>> 8);
+  }
+  return crc ^ -1;
+};