.editor-hierachy {
    width: 100%;
    flex-grow: 1;
    position: relative;
    overflow: hidden;
    background-color: rgb(30, 30, 30);
}

    .editor-hierachy > div {
        width: 100%;
        height: 100%;
        position: absolute;
        top: 0px;
        left: 0px;
        overflow: hidden;
    }

        .editor-hierachy > div:hover {
            overflow: auto;
        }