v2.12.0

• [Changed] Documented iconClass callback and changed signature from
  iconClass(node) to iconClass(event, data)
• [Added] ext-dnd events initHelper and updateHelper
• [Added] ext-dnd option smartRevert
• [Added] #146 sample for multi-node drag'n'drop
• [Added] Sample for modifier keys to control copy/move behavior while dragging
• [Added] highlight and fuzzy options to ext-filter
• [Added] fireActivate option to ext-persist (default: true)
• [Added] #496 new methods tree.findFirst() / .findAll()
• [Improved] clearFilter() performance #491
• [Improved] dnd registers global handlers to cancel on ESC and mousedown
• [Fixed] #475 Font color while editing node title with bootstrap skin
• [Fixed] #484 Glyph plugin: Missing margin-left for span.fancytree-custom-icon
• [Fixed] #486 node.render(true) moves the node to the end of the list
• [Fixed] #489 focusOnClick option is ignored for tables, if 'dnd' is listed after 'table' extension
• [Fixed] #495 Double clicking on expander with lazy-load causes assertion error
• Commit details.