Filter selection in feature table

[iimog]

In the feature table filters work. But they do not influence the selection. If an item is selected, then a filter is applied so this item disappears it is still selected and added to carts or exported. Also with multidrag. Fix this as it is more intuitive to ignore it while filtered out. But restore the selection if the filter is removed.
Unfortunatelly, tabletools (datatables) does not provide an easy way to get the filteredData.
Therefore consider doing this manually (simular to server side tables).