1-Objects with script "actionShow" point to containers or objects etc that are "hidden" in the editor should not be able to be selected after the object is unhide again in the editor. this avoid you to select unwanted hidden objects when select an area in the editor and delete it accidentaly.
2-Libray user. Lemur Editor with posibility for read files in directories and subdirectories, not only the root, so you can organize your library, actually Lemur Editor only read the directory root for files.