And it’s just a box of rain/Or a ribbon for your hair/Such a long, long time to be gone/And a short time to be there… With the passing on Friday of Phil Lesh at the age of 84, another chapter of Grateful Dead’s long, strange trip has come to a close.  A founding member of the Dead, Lesh positioned his bass as a crucial element of the band’s sound.  Even as his fluid lines complemented the rhythms of Bob Weir’s guitar and the thunderous boom of Bill Kreutzmann and Mickey Hart’s drums,…