Parent menu problem

I just noticed a problem when the menu has a submenu.
The submenu works, but when I click on the parent menu nothing happens https://becart.ba/kontakt
I added a background image to the .t4-header-inner
Is it possible to add a small white background below the menu icon, as in the attached image

I updated the file: /plugins/system/t4/themes/base/js/base.js

It should be working now.

Thanks, it's working now.
Is there any solution to the second question?

midhat
Hi
For the 2nd question how you added the Image as overlay menu use a reddish background color using this code

.t4-palette-mainnav .overlay-menu {
    background: #6a3332!important;
}

I need to add a small white background below the menu icon, as in the attached image

midhat
Sorry its not possible with current button, as the black color is used by background and it apply for these 3 lines of button only.

Ok, thanks