public String toggleReleasedSort() { toggleSort(Gradebook.SORT_BY_RELEASED); return "main"; }
public String toggleModDateSort() { toggleSort(Gradebook.SORT_BY_MOD_DATE); return "main"; }
public String toggleCreatorSort() { toggleSort(Gradebook.SORT_BY_CREATOR); return "main"; }
public String toggleModBySort() { toggleSort(Gradebook.SORT_BY_MOD_BY); return "main"; }
public String toggleTitleSort() { toggleSort(Gradebook.SORT_BY_TITLE); return "main"; }