Fix filtered search CSV Export exporting all the results

When you do a filtered search an use the csv Export, the file comes with all the results of files instead of the filtered ones only

How to reproduce

• install web-ui; dam and showcase-content add-ons
• go to web-ui default search on the left menu
• in the filters select the Between 1 MB and 10 MB option
• Click in the CSV Export icon
• open the downloaded csv (all the results are showed instead of only the ones in the filter error )