Thanks @Falco for your fast and clarifying answer . It’s clear I still have to improve my knowledge with the changes in the platform.
I am still confused wiht the new fantastic upgrade (sidebar, chat, etc..) .
What may be confuse me is the fact when I login I always have the Blue point on the chat

and before I think I had blue point on my picture.
I understand this may be configurable.
I will have a look to the post you send me. Thanks