src/admin/resources/scss/components/_toolbar.scss
.toolbar-item {
flex: 0 0 auto;
padding: 0 20px;
&:first-of-type {
padding-left: 0;
}
&-lang + .toolbar-item:not(.toolbar-item-lang) {
border-left: 1px solid $nav-tabs-border-color;
}
&:last-of-type {
padding-right: 0;
}
&-lang {
padding: 5px 10px;
}
}