Bug 32714 Packages View: flickering and loosing expanded state when logical package is selected with hierarchical layout
In the java browsing perspective: - enable hierarchical layout for the packages view - select a logical package in the packages view - select types/methods in the types/methods views -> the packages view flickers and looses the expanded state (the tree is only expanded upto the logical package, other expanded subtrees are collapsed)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/browsing/PackagesView.java
* Overrides the createContentProvider from JavaBrowsingPart
	 * Creates the the content provider of this part.
	 */
	protected IContentProvider createContentProvider() {
		if(isInListState())
			return new PackagesViewFlatContentProvider(fWrappedViewer.getViewer());
		else return new PackagesViewHierarchicalContentProvider(fWrappedViewer.getViewer());
	}
	protected JavaUILabelProvider createLabelProvider() {	
		if(isInListState())
			return createListLabelProvider();
		else return createTreeLabelProvider();
	}
	
	private JavaUILabelProvider createTreeLabelProvider() {
		return new PackagesViewLabelProvider(PackagesViewLabelProvider.HIERARCHICAL_VIEW_STATE);
	}
	private JavaUILabelProvider createListLabelProvider() {
		return new PackagesViewLabelProvider(PackagesViewLabelProvider.FLAT_VIEW_STATE);
	}
	
	/**
	 * Returns the context ID for the Help system
	 * 
	 * @return	the string used as ID for the Help context
	 */
	protected String getHelpContextId() {
		return IJavaHelpContextIds.PACKAGES_BROWSING_VIEW;
	}
	protected String getLinkToEditorKey() {