Filtering by aggregation field doesn't work

[washi (Petr Hrehorovsky)]

If user tries to filter aggregation field by is empty, no results are returned, even if there should be.

[jsusen (Jindřich Sušeň)]

FIX: "is null" filter was not working in eager loaded grids

[jsusen (Jindřich Sušeň)]

FIX: "is null" filter was not working in eager loaded grids 2023.1

[jsusen (Jindřich Sušeň)]

FIX: "is null" filter was not working in eager loaded grids 2022.4