#menu-to-edit {
    padding-left: 20px;
}

.collapser {
    vertical-align: middle;
    position: absolute;
    left: -20px;
    line-height: 42px;
}

.collapser:hover {
    cursor: pointer;
}

.collapser::before {
    content: "\f140";
    font: 400 20px/1 dashicons;
    vertical-align: inherit;
}

.collapser.is-collapsed::before {
    content: "\f139";
}

.collapser.is-disabled::before {
    color: #ebebeb;
}

#customize-theme-controls .customize-pane-child.menu .menu-item {
    position: relative;
    width: calc(100% - 10px);
    padding-left: 10px;
}

#customize-theme-controls .collapser {
    left: -7px;
}