Bug 62968 Source folders disappear in Package Explorer if set to Hierarchical Layout
I200405190010 If I set the view to "Hierarchical Layout" in the Package Explorer my "src" folder shows as empty if there are no java files in the root package (i.e. only sub-packages at the first level). Setting to "Flat" and they appear again. Tried a new Java project to recreate, but the problem is not showing on new projects. PB
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
page.bringToTop(part);
				if (obj instanceof IJavaElement)
					EditorUtility.revealInEditor(part, (IJavaElement)obj);
			}
		}
	}
	private boolean isActivePart() {
		return this == getSite().getPage().getActivePart();
	}
	
	public void saveState(IMemento memento) {
		if (fViewer == null) {
			
			if (fMemento != null) 
				memento.putMemento(fMemento);
			return;
		}
		saveCurrentFrame(memento);
		saveLayoutState(memento);
		saveLinkingEnabled(memento);
		
		
		fActionSet.saveFilterAndSorterState(memento);
	}
	
	private void saveCurrentFrame(IMemento memento) {
        FrameAction action = fActionSet.getUpAction();
        FrameList frameList= action.getFrameList();
		if (frameList.getCurrentIndex() > 0) {
			TreeFrame currentFrame = (TreeFrame) frameList.getCurrentFrame();