[PRIORITY] Session optimization (performance speed enhancement improvement) #4646
Description
- create session only when some data is added/updated
- delete cookie on logging out
- set session cookie lifetime correctly!?
- add TTL, use it for remember me
- delete expired cookies by TTL and by expiration time (7d) and anonymous expiration time (24-48h)
- shorter session idle time for guests
- don't send set-cookie each time ?
- live update for inactive tab should still work but with much much longer interval