PDI-5202: Before creating a directory, check if a directory with that same (case-insensitive check) name already exists in the repo. If it does, produce a warning, and add that existing directory to the ui. If not, create the directory in the repository before adding it to the ui.
Merge pull request #659 from rpbouman/PDI-5202

PDI-5202: Before creating a directory, check if a directory with that sa...