I’ve created a CSS snippet to work around this issue until it is fixed with a setting:
.nav-folder.mod-root {
overflow-x: hidden;
}
.nav-file-title, .nav-folder-title {
width: 100%;
padding-right: 0;
}
.nav-file-title-content, .nav-folder-title-content {
width: 100%;
overflow-x: hidden;
text-overflow: ellipsis;
}