Table rows unsorted after applying filters

[marek-mihok]

Actual behavior

When the table rows are sorted and the filter is applied, the rows become unsorted.

table-unsorted-after-filters.mov

Expected behavior

To preserve actual sort when changing active filters.

Steps To Reproduce

1. Open e.g. the table.py tour example.
2. Click on first column header to apply sort
3. Click on the second column header and apply any filter