rect_stroke changed how it renders

[cybersoulK]

Upgraded egui from 0.28.1 to master, and see a difference in rect_stroke, i much preferred the nice gradient.
is the removal of the gradient a feature or bug?

let painter = context.layer_painter(layer_id);
...
let stroke = egui::Stroke::new(6.0, color.gamma_multiply(0.5));
painter.rect_stroke(rect.clone(), 5.0, stroke);     

(ignore the slight change in blue color between the 2 screenshots)