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/errno/cli.js

@@ -0,0 +1,22 @@
+#!/usr/bin/env node
+
+var errno = require('./')
+  , arg   = process.argv[2]
+  , data, code
+
+if (arg === undefined) {
+  console.log(JSON.stringify(errno.code, null, 2))
+  process.exit(0)
+}
+
+if ((code = +arg) == arg)
+  data = errno.errno[code]
+else
+  data = errno.code[arg] || errno.code[arg.toUpperCase()]
+
+if (data)
+  console.log(JSON.stringify(data, null, 2))
+else {
+  console.error('No such errno/code: "' + arg + '"')
+  process.exit(1)
+}