mantis: change how unwanted fields are hidden

th:has([for="reproducibility"]),
th:has([for="reproducibility"]) + td,
th:has([for="severity"]),
th:has([for="severity"]) + td,
th:has([for="steps_to_reproduce"]),
th:has([for="steps_to_reproduce"]) + td,
th:has([for="additional_info"]),
th:has([for="additional_info"]) + td{
    display: none;
}