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/ui/actions/MemberFilterActionGroup.java
private static final String TAG_HIDESTATIC= "hidestatic"; 
	private static final String TAG_HIDENONPUBLIC= "hidenonpublic"; 
	
	private MemberFilterAction[] fFilterActions;
	private MemberFilter fFilter;
	
	private StructuredViewer fViewer;
	private String fViewerId;
	
	
	/**
	 * Creates a new <code>MemberFilterActionGroup</code>.
	 * 
	 * @param viewer the viewer to be filtered
	 * @param viewerId a unique id of the viewer. Used as a key to to store 
	 * the last used filter settings in the preference store
	 */
	public MemberFilterActionGroup(StructuredViewer viewer, String viewerId) {
		fViewer= viewer;
		fViewerId= viewerId;
		
		
		IPreferenceStore store= JavaPlugin.getDefault().getPreferenceStore();
		boolean doHideFields= store.getBoolean(getPreferenceKey(FILTER_FIELDS));
		boolean doHideStatic= store.getBoolean(getPreferenceKey(FILTER_STATIC));
		boolean doHidePublic= store.getBoolean(getPreferenceKey(FILTER_NONPUBLIC));
		fFilter= new MemberFilter();
		if (doHideFields)
			fFilter.addFilter(FILTER_FIELDS);
		if (doHideStatic)