Bug 25827 Disposing of MemberFilterActionGroup
Build 2.0.2 and 2.1 When investigating an editor memory leak PR we found out that this group has a dispose method which is never called. When we then called from the editor it throw an exeption (viewer was disposed). Don't know if the group really needs dispose() if so it should get called.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaOutlinePage.java
Enumeration e= deletions.elements();
					while (e.hasMoreElements()) {
						item= (Item) e.nextElement();
						disassociate(item);
						item.dispose();
					}
					
					if (doUpdateParent)
						updateItem(w, delta.getElement());
				}
				
								
				/*
				 * @see ContentViewer#handleLabelProviderChanged(LabelProviderChangedEvent)
				 */
				protected void handleLabelProviderChanged(LabelProviderChangedEvent event) {
					Object input= getInput();
					if (event instanceof ProblemsLabelChangedEvent) {
						ProblemsLabelChangedEvent e= (ProblemsLabelChangedEvent) event;
						if (e.isMarkerChange() && input instanceof ICompilationUnit) {
							return; 
						}
					}
					
					Object[] changed= event.getElements();
					if (changed != null) {
						IResource resource= getUnderlyingResource();
						if (resource != null) {