Bevy 0.15 no longer respects Material2d::depth_bias

[SludgePhD]

Bevy version

0.15

What you did

Enable wireframe on a 2D object with a ColorMaterial.

What went wrong

The wireframe renders behind the object instead of in front of it, and only its outline is visible. This happens despite the wireframe material setting a depth_bias that should make it render in front of the other material:

bevy/crates/bevy_sprite/src/mesh2d/wireframe2d.rs

Lines 231 to 233 in 141b767

	fn depth_bias(&self) -> f32 {
	1.0
	}

This issue seems similar to #14169, the 3D version of this problem.

This worked properly in bevy 0.14.

[IceSentry]

I think the solution is this PR or something like this #16511