Bug 16308 [DND] dnd from os to navigator shows an incorrect icon
smoke test for 0518 it shows a move icon although move will not happen
bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/navigator/NavigatorDropAdapter.java
*/
	public void dragOver(DropTargetEvent event) {
		try {
			 
			
			Object oldTarget = getCurrentTarget();
			super.dragOver(event);
			if (oldTarget != getCurrentTarget()) {
				hoverStart = System.currentTimeMillis();
			} else {
				
				if (hoverStart > 0
					&& (System.currentTimeMillis() - hoverStart) > hoverThreshold) {
					expandSelection((TreeItem) event.item);
					hoverStart = 0;
				}
			}
		} catch (Throwable t) {
			handleException(t, event);
		}
	}
	
	/**
	 * Returns an error status with the given info.
	 */
	private IStatus error(String message) {
		return error(message, null);
	}
	
	/**