onNodeBeforeExpand override prevents the store from loading child nodes that aren’t loaded before
Revert "onNodeBeforeExpand override prevents the store from loading child nodes that aren’t loaded before"

This reverts commit 96921d4eda6abc0814333a214258c82a46136c69.
fixing some jshint errors (indentation and missing vars)
fixing some more jshint indentation errors and an undefined var
Added convenience way to apply just the treestore id
FIX store validation
dynamic loading of child nodes works now
TODO: sort list items -> new child nodes are at the end of the list
FIX for new children added to a treestore at the wrong index
Merge branch 'hotfix/1.1.1'