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/loupe/lib/set.js

@@ -0,0 +1,16 @@
+import { inspectList } from './helpers'
+
+// IE11 doesn't support `Array.from(set)`
+function arrayFromSet(set) {
+  const values = []
+  set.forEach(value => {
+    values.push(value)
+  })
+  return values
+}
+
+export default function inspectSet(set, options) {
+  if (set.size === 0) return 'Set{}'
+  options.truncate -= 7
+  return `Set{ ${inspectList(arrayFromSet(set), options)} }`
+}