Seniors Want ‘McJoe’...    As a group, senior citizens are docile, taking in stride whatever comes next. The majority “tsk, tsk, tsk” at the world, perhaps adding such comments as, “Oh, well, it’s a new day.”    Ray Croc, the late mastermind who introduced McDonald’s with a single store near Chicago, believed strongly in the “golden arches”--perhaps fast foods’ most recognized icon.    The company initially bragge ...