Bug 11770 java browsing: multi-selection disabled in 2 of 4 views
multi selection is disabled in the package and type views but it's enabled in project and member views
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/browsing/JavaBrowsingPart.java
* Adds filters the viewer of this part.
	 */
	protected void addFilters() {
		
	}
	/**
	 * Creates the the content provider of this part.
	 */
	protected BaseJavaElementContentProvider createContentProvider() {
		return new JavaElementContentProvider(true, this); 
	}
	protected void setInitialInput() {
		
		ISelection selection= getSite().getPage().getSelection();
		Object input= getElementFromSingleSelection(selection);
		if (!(input instanceof IJavaElement)) {
			
			input= getSite().getPage().getInput();
			if (!(input instanceof IJavaElement) && input instanceof IAdaptable)
				input= ((IAdaptable)input).getAdapter(IJavaElement.class);
		}
		setInput(findInputForJavaElement((JavaElement)input));		
	}
	protected void setInitialSelection() {
		
		Object input;
		ISelection selection= getSite().getPage().getSelection();
		if (selection != null && !selection.isEmpty())
			input= getElementFromSingleSelection(selection);
		else {