Hi
this is a very specific usability point. To be adjusted only after having solved all other issues
When I’m working with a full sized window the menu is on top of the page (which I like much more than the hamburger menu in the smaller windows). But every time I add some item there is a green confirmation message or some yellow warning etc. This message covers exactly the menu and you always have to click twice to select the menu. I would prefer to display this confirmation or error messages as a small popup in some lower right corner (e.g.).
Example screenshot of the current state: