Bug 299438 [CommonNavigator] CNF viewer state non properly reset when NCEs are activated or deactivated
The map of the objects to the NCEs should be reset whenever the NCEs associated with the viewer to change to avoid having stale label information. This has shown up when looking at the CNF tests that change the viewer.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/StructuredViewer.java
/*
	 * (non-Javadoc) Method declared on Viewer.
	 */
	protected void hookControl(Control control) {
		super.hookControl(control);
		OpenStrategy handler = new OpenStrategy(control);
		handler.addSelectionListener(new SelectionListener() {
			public void widgetSelected(SelectionEvent e) {
				
				
				
				if (!inChange) {
					handleSelect(e);
				}
			}
			public void widgetDefaultSelected(SelectionEvent e) {
				handleDoubleSelect(e);
			}
		});
		handler.addPostSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				handlePostSelect(e);
			}
		});
		handler.addOpenListener(new IOpenEventListener() {
			public void handleOpen(SelectionEvent e) {
				StructuredViewer.this.handleOpen(e);
			}
		});
	}