I have a table that lists people’s attendance by month and by class.
The table is filtered by Class
I have a filter control on the month, so i can select a month to see the people who were in the table-filtered class.
However the filter control contains months that are not part of the table-filter (months that only contain classes that are not in the table filter).
How can i filter the filter-control to only contain the months i need/want?