Drop Default impl from ListStore

[bilelmoussaoui]

Maybe just rename the constructor to something else to avoid foot guns with #[derive(Default)]

[sdroege]

There's no problem with the new() function because it takes a parameter. That can stay as it is :)

[bilelmoussaoui]

There's no problem with the new() function because it takes a parameter. That can stay as it is :)

Yes, I meant replacing ListStore::default() with something like ListStore::default_object()

[sdroege]

I would just remove that one. What is it good for?

[pbor]

The Default is generated because gir generates one every time generate_builder is true. We need a new flag in gir or better heuristic