styles.css

.workspace-leaf-content.folder-focus-mode .hidden-tree-element {
	height: 0px;
	opacity: 0;
	pointer-events: none;
}

.workspace-leaf-content.folder-focus-mode.folder-focus-mode-simplified .folderfocus-parent:not(.is-collapsed)>.nav-folder-title {
	height: 0px;
	opacity: 0;
	pointer-events: none;
	margin:0;
	padding: 0;
}

.workspace-leaf-content.folder-focus-mode.folder-focus-mode-simplified div.nav-folder.mod-root .nav-folder.folderfocus-parent:not(.is-collapsed)>.nav-folder-children {    
	padding-left: 0;
    margin: 0;
    border: none;
}

.folder-focus-mode.folder-focus-mode-simplified  .folderfocus-up-element-link {
	opacity: .6;
	font-size: 70%;
}

.folder-focus-mode.folder-focus-mode-simplified  .folderfocus-up-element-link .nav-folder-title-content::before {
	content: '<';
	margin-right: 5px;
}

.folder-focus-mode.folder-focus-mode-simplified  .folderfocus-up-element-link .nav-folder-collapse-indicator {
	pointer-events: none;
	display: none;
}