skip incremental update to jstree if the changed node was not loaded yet
fix change event handling for incremental additions vs. an initial load_node based on the current state of jstree
remove test files
add required success/error callbacks for jstree load_node
revert submodule add
Merge pull request #6553 from adobe/jasonsanjose/issue-6537-ProjectManagerOnly

Skip incremental update to jstree if the changed node was not loaded yet