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/typehierarchy/MethodsViewer.java
super.inputChanged(input, oldInput);
	}
	
	/**
	 * Returns <code>true</code> if inherited methods are shown.
	 */	
	public boolean isShowInheritedMethods() {
		return ((MethodsContentProvider) getContentProvider()).isShowInheritedMethods();
	}
	/**
	 * Saves the state of the filter actions
	 */
	public void saveState(IMemento memento) {
		fMemberFilterActionGroup.saveState(memento);
		
		memento.putString(TAG_SHOWINHERITED, String.valueOf(isShowInheritedMethods()));
		ScrollBar bar= getTable().getVerticalBar();
		int position= bar != null ? bar.getSelection() : 0;
		memento.putString(TAG_VERTICAL_SCROLL, String.valueOf(position));
	}
	/**
	 * Restores the state of the filter actions
	 */	
	public void restoreState(IMemento memento) {
		fMemberFilterActionGroup.restoreState(memento);
		getControl().setRedraw(false);
		refresh();
		getControl().setRedraw(true);
		
		boolean set= Boolean.valueOf(memento.getString(TAG_SHOWINHERITED)).booleanValue();