feat(webapp): chat link to chat page

Created by: maeckes-infinitylabs

🍰 Pullrequest

The user can now navigate to the main chat page from a single chat window, and the room from the single chat is open on the chat.

Icon on user page:

After click on icon, the same chat room is open on main chat:

Issues

• fixes #6588 (closed)

Todo

• None