Need Action Bar stick when scroll the page

BlueTangerineSolutions

Hi! This is the test site link. https://gulfcoastadoptions.bluetangtest.com/

The menu will stick when scroll, but the action bar will disappear, but I want the action bar to also stick with the menu.

The action bar does not have a stick option. so please let me know how to make the action bar keep stick with the menu.

Thank you!