Eight-year-old restaurant Causwells in the Marina District just closed for a two-week remodel and a revamp of its entire menu, and while there is still that popular cheeseburger, there's some more adult stuff to find there as they reopen Tuesday night.It's a moment of reflection and renovation for some SF restaurants as we emerge — mostly — from 30 months of pandemic. Monday night saw the reopening of Marlena in Bernal Heights, which first made …