Dawson’s Market, closed since late October, makes a triumphant return this weekend with a new owner and a new commitment to serving as a “one-stop shop” for Rockville Town Square. Longtime manager Bart Yablonsky has purchased the store from its out-of-town owners and is making changes that he says the community has asked for. “We’re expanding the product mix with more national brands that people will recognize and more convenience items like flashlights and batteries,” he says. “We’ll have freshly sliced meats and cheeses at the deli, and a new selection of conventional produce along with the organics.” Yablonsky says the wider range of products will allow for lower prices on some items — but he promises the store will continue to specialize in local and organic foods.