Advanced document search: empty field still is active after apply an other filter

If there is a filter applied for search operation and search is made to find results. Then if we remove text in the search field then empty field should not be active after we apply another filter.

This means the filter should not have any impact on the search results and should not have a red cross.

Steps to replicate:

1. Go to https://cms.demo.onehippo.com/document-search
2. Filter on title by using Title filter. E.g. 'Earth Kit'
3. Clear title filter (do not remove the filter by clicking on the red cross, but make the field empty)
4. Apply other filter
5.