v2.20.0

• [Added] #419 modifyChild event. This event is also a good place to
  implement auto sorting (#559)
• [Added] #419 node.triggerModifyChild() and node.triggerModify()
• [Added] #595 add custom node filter to generateFormElements()
• [Added] #610 tree.tooltip option allows automatic or custom tooltips
• [Added] #620 improved tooltip escaping to allow newlines
• [DEPRECATED] removeNode event. Listen for modifyChild with operation
  'remove' instead (which is fired on the parent).
• [Improved] ThemeRoller theme
• [Improved] ext-filter
  • #297 add filter option 'hideExpanders' to remove expanders if all child
    nodes are hidden by filter
  • Filter options and the opts argument of filterNodes() / filterBranches()
    have been unified.
  • [Fixed] #230 themeroller theme compatible with ext-filter
  • [Fixed] #528 autoCollapse option blocks filter's autoExpand option
  • [Fixed] #529 Filter: Mark matching nodes even if parent was matched in branch mode
  • [Fixed] #643 Exceptions in ext-filter if expression contains special chars
  • [Fixed] #658 ext-filter does not work with ext-edit editCreateNode()
• [Improved] #656 WAI-ARIA support
  • Set focus to first node on first tab-in
  • Support [home] and [end] keys
  • Set aria-activedescendant on container to active ID
  • Set aria-multiselectable on container if selectMode != 1
  • Set aria-treeitem, -selected, -expanded, on title span instead <li>
• [Fixed] #576 loadKeyPath() sometimes gets the root wrong
• [Fixed] #615 Drag & drop helper icons lose indentation with table extension
• [Fixed] #632 Tabbing is not working if there is an anchor tag in treeview
• [Fixed] #644 New nodes created with ext-edit, are hidden in filtered trees
• [Fixed] #647 ext-table: tree.render(true) does not discard existing markup
• [Fixed] #659 handling of function keys, when quicksearch is on
• Use QUnit 2.0

Commit details.