groups_print_activity_menu() and groups_get_activity_group() now include
an additional $participationonly parameter,
which is true by default. This can be set false when we want the user to
be able to select a non-participation group within
an activity, for example if a teacher wants to filter assignment
submissions by non-participation groups. It should never be
used when the menu is displayed to students, as this may allow them to
participate using non-participation groups.
groups_sort_menu_options() now has a $splitparticipation parameter,
which will split non-participation groups out into their own optgroup at
the end of the menu.
Mark Johnson
66328d8428