I agree. I would add that it would be appropriate to have the possibility of creating dynamic components, when you modify the 'master' at the same time you modify the 'children'.

It is already possible to create a customisable navigation bar, but sometimes it disappears and some icons (which are loaded images) disappear. It is not necessary to have a new customisable navigation bar, but it would be nice to have one with newer icons and a modern design.