We have a use case to choose missing values from a specific column. Missing values are left undefined on the data source. As of now, using a kendoFilterMultiCheck filter will automatically not include these values in the filter list of the dropdown. Our users wish to see rows that have a blank, missing, null value in this column. The filter also doesn't behave as expected in this regard. The following workflow will not have expected results:
1. Choose the "select all" option to filter the column
2. Apply filter
3. Uncheck the "select all" option
4. Apply filter
The resulting grid will have all blank values missing.
I've included a sample that demonstrates our use case.