As we move into the spring shopping season, several stores are reaching their final days at Westfield Montgomery mall. Invisalign, whose parent company is shuttering all its retail operations, will depart on April 3rd. Crabtree & Evelyn, also closing stores across the country, is nearly empty after a lengthy going-out-of-business sale. Italian men’s store Fascino is calling its quits just two months after relocating to a prime spot in the Macy’s wing. But Gymboree and Payless, whose parent companies both filed bankruptcy in the past few months, will hang around awhile longer as they continue to unload excess merchandise.