Bug 18071 Package Viewer: Too many refreshes
F1 - when a working copy is closed, it's package is updated - update on a package results in a refresh as the abstract filter claims that IMAGE is a filter property
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/JavaElementContentProvider.java
if (fViewer.testFindItem(parent) == null)
						postRefresh(grandparent);
					else {
						postRefresh(parent);
					}	
				}
			} else {  
				postAdd(parent, element);
			}						
		}
		if (element instanceof ICompilationUnit) {
			if (getProvideWorkingCopy()) {
				IJavaElement original= ((IWorkingCopy)element).getOriginalElement();
				if (original != null)
					element= original;
			}
			if (kind == IJavaElementDelta.CHANGED) {
				postRefresh(element);
				return;
			}
		}
		
		if ((element instanceof ICompilationUnit) || (element instanceof IClassFile))
			return;
		
		if (isClassPathChange(delta)) {
			  
			postRefresh(element.getJavaProject());
		}