Grid Filter Sorting Error


I am using Dhtmlx PRO v2.5.

I have a problem with my grids when Filter and Sorting is added.

When clicking on the Filter side (not inside the text area) the sorting is launched.
Also the image sorting appears at the side of the filter.

Do you know how we can correct this in order not to sort by clicking on the filter?

Thanks in advance

If you are clicking outside of the filter box - click processed as normal click on header and results in sorting.

It possible to access related cell ( or row ) of header through the DOM and block click processing.
Something like

grid.hdr.rows[1].cells[2].onclick = function(e){ (e||event).cancelBubble = true; };