Bug 172019 [Viewers] Plus sign doesn't disappear when using deferred content providers
3.3 M4 Use a tree viewer with a content provider using IDeferredWorkbenchAdapter and DeferredTreeContentManager. When fetchDeferredChildren is call and no elements are reported to the element collector the plus sign of the node doesn't disappear. This work without problems under Windows and Mac/OS (e.g. the plus sign disappears).
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
* tree and handles the automatic expand feature.
	 */
	protected void inputChanged(Object input, Object oldInput) {
		preservingSelection(new Runnable() {
			public void run() {
				Control tree = getControl();
				boolean useRedraw = true;
				
				
				if (useRedraw) {
					tree.setRedraw(false);
				}
				removeAll(tree);
				tree.setData(getRoot());
				internalInitializeTree(tree);
				if (useRedraw) {
					tree.setRedraw(true);
				}
			}
		});
	}
	/**
	 * @param tree
	 */
	protected void internalInitializeTree(Control tree) {
		createChildren(tree);
		internalExpandToLevel(tree, expandToLevel);
	}
	/**
	 * Recursively collapses the subtree rooted at the given widget to the given