Render border above active progress for progress_bar widget.

[B0ney]

Before:

After:

[B0ney]

Looks like I discovered a transparency bug in tiny-skia:

wgpu:

sscce:

use iced::widget::container;
use iced::widget::progress_bar::Style;
use iced::widget::progress_bar;
use iced::{Border, Color, Element, Length};

pub fn main() -> iced::Result {
    iced::program("Progress Bar - Iced", Progress::update, Progress::view)
        .theme(|_| iced::Theme::Light)
        .run()
}

#[derive(Default)]
struct Progress;

impl Progress {
    fn update(&mut self, _: ()) {}

    fn view(&self) -> Element<()> {
        container(progress_bar(0.0..=100.0, 50.0).style(|_| Style {
            background: Color::BLACK.into(),
            bar: Color::from_rgb8(0, 255, 0).into(),

            border: Border {
                color: Color::from_rgba8(0, 0, 127, 0.5),
                width: 4.0,
                ..Default::default()
            },
        }))
        .padding(20)
        .center_x(Length::Fill)
        .center_y(Length::Fill)
        .into()
    }
}