frappe/webnotes/public/css/tree_grid.css

.cell-title {
	font-weight: bold;
}

.cell-effort-driven {
	text-align: center;
}

.toggle {
	height: 9px;
	width: 9px;
	display: inline-block;
}

.toggle.expand {
	background: url("../lib/images/icons/expand.gif") no-repeat center center;
}

.toggle.collapse {
	background: url("../lib/images/icons/collapse.gif") no-repeat center center;
}