When there are filters applied to groups (either in Pivot or Flat mode) these are not displayed in the headers with the classic funnel icon:
    
        
             
    
We propose to highlight the Filter tab with a colour (or other ways) whenever a filter is applied to any field in the FlexGrid:
    
        
             
    
This would also be useful to have immediate evidence of filters on fields that can only be displayed using scrollbars.
Thank you