### Steps to reproduce

* Go to the WP page
* Open the filter section, add a filter (e.g "status --> is --> new"
* Click on the cross to remove the `new`  attribute from the filter

### Actual

* When adding the filter, the table is reloaded and the filter applied
* Removing the attribute has however no effect:
* The table does not refresh Begin of the deletion
* The result list is wrongEnd of the deletion

### Expected

* Begin of the insertionAs an empty value is invalid we need to make it clear toEnd of the insertion Begin of the deletion RemovingEnd of the deletion the Begin of the insertionuser, thatEnd of the insertion Begin of the deletion attribute should refreshEnd of the deletion the Begin of the insertionshown list is incorrect.
* Grey out the list until a value is there again
* Highlight the input field that is missing a value (e.g. with a red border)End of the insertion Begin of the deletion table.End of the deletion