Sandra A. Johnson, who loved a good practical joke and trips to the casino, died July 14 after a brief illness. She was 81. Family and friends remember her for her quiet strength and selflessness, her devotion as a mother, grandmother, great-grandmother, foster mother, sister, aunt, nurse and friend who dedicated her life to caring for others. She loved practical jokes and enjoyed making people laugh, bingo and trips to the casino. her quiet st…