Commits for 2020-12-27

The following 5 changes have been made on 2020-12-27:

- sitemaps admin changes (Author: Mirko De Grandis, Hash: #a93a8f8)
- moved functions to right place. (Author: Mirko De Grandis, Hash: #357de01)
- more timeline info on debug (Author: Mirko De Grandis, Hash: #da73131)
- improved UserSession class (Author: Mirko De Grandis, Hash: #1c450e8)
- added UserSession model (Author: Mirko De Grandis, Hash: #3a727a8)

Check it out. More are coming soon!