TextureProgress: progress_offset now added to relative center

[RedHeadphone]

progress_offset of TextureProgress wasn't moving the reference cross. Hopefully this would fix it.

fixes #55338

[KoBeWi]

This isn't a right fix. E.g. here

godot/scene/gui/texture_progress_bar.cpp

Lines 478 to 479 in 52b7d5f

	uvs.push_back(get_relative_center());
	points.push_back(progress_offset + s * get_relative_center());

the progress_offset is added to the relative center, so it's applied twice.

I'd instead adjust only the cross position, so add the offset somewhere here:

godot/scene/gui/texture_progress_bar.cpp

Lines 495 to 506 in 52b7d5f

	Point2 p;
	if (nine_patch_stretch) {
	p = get_size();
	} else {
	p = progress->get_size();
	}
	p *= get_relative_center();
	p = p.floor();
	draw_line(p - Point2(8, 0), p + Point2(8, 0), Color(0.9, 0.5, 0.5), 2);
	draw_line(p - Point2(0, 8), p + Point2(0, 8), Color(0.9, 0.5, 0.5), 2);

[KoBeWi]

Looks good now, but you need to squash your commits.

[RedHeadphone]

@KoBeWi
I squashed the commits

[akien-mga]

Thanks!

[akien-mga]

Cherry-picked for 3.5.

[akien-mga]

Cherry-picked for 3.4.1.