Bug 86515 [Drag and Drop] Drag and drop (move) for project
Drag and drop (move) for project onto Explorer deletes the project from the file system. But this is not reflected in the workspace. Pressing refresh - provides dialog "location deleted" and remove project from the workspace.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/FileTransferDragAdapter.java
runOperation(op, true, false);
	}
	protected Set collectRoots(final List elements) {
		final Set roots= new HashSet(10);
		
		Iterator iter= elements.iterator();
		while (iter.hasNext()) {
			IResource resource= (IResource)iter.next();
			IResource parent= resource.getParent();
			if (parent == null) {
				roots.add(resource);
			} else {
				roots.add(parent);
			}
		}
		return roots;
	}
	
	private List getResources() {
		ISelection s= fProvider.getSelection();
		if (!(s instanceof IStructuredSelection)) 
			return null;
		
		return convertIntoResources((IStructuredSelection)s);
	}
	private List convertIntoResources(IStructuredSelection selection) {
		List result= new ArrayList(selection.size());
		for (Iterator iter= selection.iterator(); iter.hasNext();) {
			Object o= iter.next();
			IResource r= null;