filterFunction not called when hideSubHeader: true

In my angular application I have hidden the sub-header as I have common filter for all text fields.
Further I need a selection of time periods (the field in the array given to the localDataSet is a string containing JSON date format)
Now i realized that the filterFunction is only called when the filter field actually is shown. When it is hidden, either by hideSubHeaders or by setting filter: false for that column it is no longer executed.

I have created a simplified example in https://plnkr.co/edit/tjmxZLJukGrc8ZxhBI8v?p=preview

Pressing the button "just today" shows no result unless you remove the line hideSubHeaders: true.
The button "just with "f"" is just there to show that setFilter works for default filtering.