MONTGOMERY, Ala. — “To Kill a Mockingbird” author Harper Lee is at odds with a museum in her Alabama hometown that celebrates her literary achievement over use of the words in the title of her Pulitzer Prize-winning novel. Lee is seeking a trademark for the words when they are used on clothing. The Monroe County Heritage Museum in Monroeville is opposing the application, contending the sale of souvenirs with the words is vital to its continued operation. Lee’s New York attorney, Robert …