Newish Mate user here. I've recently started customizing an instance of MATE for a system I am working on and I'm running into an annoying issue where the "Start" Menu, "Main" Menu, or whatever its technically called, has this ugly down arrow over the icon for it. I can change the Icon to be whatever I want but the down arrow over the icon remains.
I've seen some chatter on this for older versions of mate but not much in the way of current solutions. I can provide a screenshot if its not immediately obvious what I'm talking about, but does anyone know how to remove this?
I would also appreciate any tutorials, guides, or knowledge documents related to creating custom themes and Icon Sets as I haven't really messed with this much since GTK2 back in the early 2000's and I understand there's a bit of a learning curve/change to GTK3 and 4.
Edit: Adding Image showing what I'm irked by