To make the modules more mobile freindly I suggest the idea of allowing an administrator option to choose a variety of menu's similar to how porto gives you the option to choose your theme menu style.
Issue is it would be nice to have the menu at the top of the page but not show all the categories. A hamburger style or one that just shows the word "Categories" + carrot would be a second choice option or default. It would probably be good if it was different or opposite to the one porto uses. so this is why I suggest an option. It might look odd with two hamburgers one after the other. So similar to that a Categories ^ or Categories --- Carrot or Hamburger would help clear up confusion for the web app user.
Take a look at our Live StoreFront demo. We automatically convert the categories into a collapsible menu; perhaps, that would make more sense for other modules as well.
Let me know what you think.