HOUSTON — Barbara Bush, the snowy-haired first lady whose plainspoken manner and utter lack of pretense made her more popular at times than her husband, President George H.W. Bush, died Tuesday. She was 92. Family spokesman Jim McGrath confirmed the death in a statement. The cause wasn’t immediately known. Mrs. Bush brought a grandmotherly style to buttoned-down Washington, often appearing in her trademark fake pearl chokers and displaying no vanity about her white hair and wrinkles. “What you see with me is what you get.