v2.19.0

• [Added] #607 tree.enableUpdate() to temporarily disable rendering to improve
  performance on bulk updates
• [Added] modifier class .fancytree-connectors to be set on container
  
  Note: Experimental! Not required for skin-xp and not compatible with ext-table
• [Added] #623 ext-edit: data.originalEvent is now passed to beforeClose
• [Fixed] #604 Set source option does not update tree
• [Fixed] #609 node.load(true); doesn't maintain expanded
• [Fixed] #621 Cannot focus embedded input controls
• [Improved] #611 Keyboard navigation honors autoScroll option
• Extensions inherit main version number

Commit details.