table.simple-tree-table .tree-icon{display:inline-block;width:12px;margin:5px;padding:0 5px}table.simple-tree-table tr.tree-closed .tree-icon,table.simple-tree-table tr.tree-opened .tree-icon{text-align:center;cursor:pointer}table.simple-tree-table tr.tree-opened .tree-icon:after{content:"-"}table.simple-tree-table tr.tree-closed .tree-icon:after{content:"+"}