It is added an arbitrary 20px padding at the right of menu items with sub menus. This break the layout, it should be added only the standard $topbar-link-padding.
@if($topbar-arrows){
& > a {
- padding-#{$opposite-direction}: $topbar-link-padding + 20 !important;
+ padding-#{$opposite-direction}: $topbar-link-padding !important;
&:after {
@include css-triangle($topbar-dropdown-toggle-size, rgba($topbar-dropdown-toggle-color, $topbar-dropdown-toggle-alpha), top);
margin-top: -($topbar-dropdown-toggle-size / 2);