Custom frames for windows not applied correctly

[Tearth]

Describe the bug
Since version 0.25 there is a visual bug when we set a custom window frame. In 0.24 the code below was making the window all green (as expected) with little margin.

let frame = egui::containers::Frame::none()
    .fill(egui::Color32::from_rgb(180, 220, 160))
    .inner_margin(egui::Margin::symmetric(20.0, 20.0));

In 0.25 and 0.26 the same code makes it only partially green with title bar area still with its original color, which is also not properly adjusted to the title.

To Reproduce
Steps to reproduce the behavior:

1. Go to egui_demo_lib -> window_options.rs
2. Find creation of "demo_window_options" window
3. Make it as below:

use super::View as _;
let frame = egui::containers::Frame::none() // <-- new
	.fill(egui::Color32::from_rgb(180, 220, 160)) // <-- new
	.inner_margin(egui::Margin::symmetric(20.0, 20.0)); // <-- new
let mut window = egui::Window::new(title)
	.id(egui::Id::new("demo_window_options"))
	.frame(frame) // <-- new
	.resizable(resizable)
	.constrain(constrain)
	.collapsible(collapsible)
	.title_bar(title_bar)
	.scroll2(scroll2)
	.enabled(enabled);

Expected behavior
Just as in 0.24 and earlier, the whole window area should be colored green with no exception for title bar.

[emilk]

Was this solved by #3995 ?

[Tearth]

Sadly no, I was testing it on the most recent master which already includes fix from #3995.

[rustbasic]

@Tearth
Is the color-related thing similar to
#3806 ?

[Tearth]

@Tearth Is the color-related thing similar to #3806 ?

Seems like yes, and turns out adding context.style_mut(|p| p.visuals.window_highlight_topmost = false); similarly as you did in your issue fixed the thing - the window is now displayed as I was used to before 0.25. Thanks for the link!