Provide a user interface for assigning icons to menu items

Styling is done with theme, not with menu manager..

I agree styling of menus should be done via CSS, what would be best is if each menu item recieved a unique class.

Yes but, when contributors want to use a set of icons that have a role of representation of the content, the ability to assign an image for each menu item by the menu manager would be very usefull, because contributors may want to change an icon just to make sense differently in the content. So adding an image to a menu item is not only a styling problem. It can be a content problem and I wish also this feature !

Note that I have a patch at #42493: Enable custom bullets/icons for specific menu items which aims to provide some of the underlying functionality that would allow this to happen, but not a user interface.

I suggest we leave this issue open for the user interface (which doesn't seem likely for Drupal 7 core at this point, but you never know) and focus efforts on the other issue. If that happens, it would perhaps be easier to write a contrib module that provides the user interface as well.

tag

Let's focus on #42493: Enable custom bullets/icons for specific menu items first.

Duplicate issues are extremely bad for discovery.