Bug 262606 [CommonNavigator] Up button after "go into" has bad tooltip text
I20090127-0100 1) Select a Java project 2) right-click, select "Go Into" 3) Hover over the Up button, the tooltip text is impressive
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonNavigator.java
}
		return false;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.ui.ISaveablePart#isSaveAsAllowed()
	 */
	public boolean isSaveAsAllowed() {
		return false;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.ui.ISaveablePart#isSaveOnCloseNeeded()
	 */
	public boolean isSaveOnCloseNeeded() {
		return isDirty();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.ui.part.IShowInTarget#show(org.eclipse.ui.part.ShowInContext)
	 */
	public boolean show(ShowInContext context) {
		IStructuredSelection selection = getSelection(context);
		if (selection != null && !selection.isEmpty()) {
			selectReveal(selection);
			return true;
		} 
		return false;
	}
	private IStructuredSelection getSelection(ShowInContext context) {
		if (context == null)
			return StructuredSelection.EMPTY;
		ISelection selection = context.getSelection();