How to force free jqgrid do draw frozen column borders for search toolbar

If actions column has caption "Activity"/custom settings and is frozen, free jqgrid does not draw colum borders for this column in search toolbar.

To reproduce, open page in

http://ift.tt/1ddtZ2s

Vertical lines does not appear in search toolbar:

How to fix this so that column borders appear for Activity column in search toolbar ? Demo in http://ift.tt/1ddu1r6 has borders.

In testcase styles from answer in Remove dancing effect in Chrome from free jqgrid toolbar buttons in font awesome icons are used are used to remove borders from toolbar buttons. Maybe those remove column border also.