A.4.1.13 Tree Handling

The <al-tree> tag now has a single attribute which enables the single select mode. In single select mode, selecting a node automatically deselects any previously selected node.

The <al-input> tag now supports the treefold="expr", treeselect="expr", and treeellipsis="expr" attributes. The expression specifies a tree node that is used to construct a tree iterator input value.

The following methods have been added to the LazyTreeIterator class; load_children(), is_selected(), select_alias(), open_alias().