Edit each custom menu of menus provider

[mesteryui]

Describe the feature
Walker allows to use XML to edit. the menus, so I want a function that allows to edit each menu layout for example if I have a wallpaper menu defined as a menu of menus have a easy posibility to configure that layout

Alternatives
At the style of walker I don't know

Describe the behaviour
Have a custom menu with layout what you want

[abenz1267]

What exactly do you want to change about the layout? everything?

[mesteryui]

I want to change also the layout of custom menus I do with toml or lua, I mean if I create a wallpaper menu I want to use it horizontally without use the entire menus provider of that way

[nino-mau]

@abenz1267 would be good if you could assign specific custom menus to use specific themes or global layout, right now in a theme you can create different item layouts for custom menus but you can't change things like the GtkGridView per custom menus, or at least it's not documented

[abenz1267]

this is actually not as easy as it seems to be. right now you can define columns per provider/menu. Whole themes is a different story and would require a lot of refactoring.