pass both manifestURL and bookmarkURL on EvmeShortcutCreate and EvmeShortcutAddApp events
simplifying - call addShortcut for pre-installed folders, not by triggering EvmeShortcutCreate
better hiding behavior when dropping an app on another to create a SmartFolder
SmartFolderSettings also saves the icons
IconManager.js renaming parameters for clarity
update SmartFolder icons with installed apps when queryIndex updates