Stores May Come, Go, Southside Mall Endures With 36 Tenants, Manager Montanti Says Entertainment Will Invigorate County’s Largest Warm, Covered Space By JIM KEVLIN ONEONTA – On Feb. 19, the national chain, Payless Shoesource, filed for Chapter 11 bankruptcy and announced it is closing its 2,500 North American stores, including one in Southside Mall. That made it a local news story. But right down the marble-tiled mezzanine, the expansive Shoe Department is doing so well it’s looking to expand, Mall…