Grid column resize


I have a DHTMLX enterprise license for suit 6.5.
license reg. number - 19007023

In my grid all columns are re-sizable. When i’m resign columns except last column and make them narrow down and narrow down the last column then last column header text is emerge.
You can check issue through above link by narrowing columns.

refer uploaded image.
So please provide solution for same

Please, try to add the following css as a workaround: