Save session each time a tab is open, closed or updated, to better organize and save resources avoiding session duplicates

[leoncrf]

I believe some people use self save session every 1 minute to lose anything, but this accumulates a large number of saved sessions, and limiting the number of saved sessions would not be so useful either because we still have exactly equal saved sessions, while we would also lose older sessions that were discarded by limit of saved sessions.

Save the session each time a tab is open, closed or updated would make the amount of saved sessions more organized, avoid duplicates and probably populate some amount of memory.