Bug 289090 [CommonNavigator] labels are missing
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/NavigatorContentServiceLabelProvider.java
* @see org.eclipse.jface.viewers.ILabelProvider#getImage(java.lang.Object)
	 */
	public Image getImage(Object anElement) {
		return getColumnImage(anElement, -1);
	}
	public Image getColumnImage(Object element, int columnIndex) {
		Collection contentExtensions = contentService.findPossibleLabelExtensions(element);
		Image image = null; 
		for (Iterator itr = contentExtensions.iterator(); itr.hasNext() && image == null; ) { 
			image = findImage((NavigatorContentExtension) itr.next(), element, columnIndex);
		}
		return image;
	}
	/**
	 * <p>
	 * Return a String representation of anElement to be used as the display name in the tree
	 * viewer.
	 * </p>
	 * 
	 * @param anElement
	 *            An element from the Tree Viewer 
	 * @return The String label to display for the object when represented in the viewer.
	 * @see org.eclipse.jface.viewers.ILabelProvider#getText(java.lang.Object)
	 */
	public String getText(Object anElement) {
		return getColumnText(anElement, -1);
	}
	public String getColumnText(Object anElement, int aColumn) {
		ILabelProvider[] labelProviders = contentService.findRelevantLabelProviders(anElement);
		String text = null;