Session filters by user

[Bnowako]

Problem:
When multiple people colaborate on open-inspect it's easy to loose your sessions.

Solution:
Allow to filter sessions by user.

By default show current user sessions, and allow to toggle 'all' / filter by user.

[Bnowako]

@ColeMurray I think it would be nicer if we would show in my sessions, all sessions the user participated in, but this info is in DO. Wdyt about adding a table which would be an index of user-session that we can easily retrieve there?

If you sent 1 message to a session it will be shown as "My sessions"