There comes a point during “Eleanor the Great,” a film that presents itself as an inoffensive festival crowdpleaser with enough charm to carry its 90-odd minute runtime, where everything goes topsy-turvy. Beyond this point of no return, one assumes a daring and unpredictable story lies ahead. How disappointing, then, that such an unexpected decision still yields a middling matinee charmer with far too little glue to hold far too many threads together. After starring in this summer’s “Jurassic World Rebirth” and topping Hollywood’s chart of profitability, Scarlett Johansson has stepped behind the camera with her first feature as a director. For such a leviathan movie star’s directorial debut, “Eleanor the Great” is an admirably small effort. There’s a lack of ego in taking on a project so intimately staged that nearly belies its quality. “Eleanor the Great” follows Eleanor Morgenstein (June Squibb), a 94-year-old Jewish woman who moves back to New York after her best friend of 70 yea...