Nav pushes down Carousel in mobile-sized window

[AntJanus]

Tested on Chrome:

When the menu is not collapsed, the carousel looks fine:

I did a quick fix that seems to work:

.navbar-collapse {
 position: absolute;
 width: 100%;
 background-color: #222222; //background color of the navigation bar
}

After my hacky fix:

However, I'm sure there is a better solution.

This bug is probably related to #9901 except that the carousel controls are in the correct place at all times (with the carousel itself).