### Godot version

6ca1bf9589404b7643d8bf6cfb114dacf537f67b

### System information

PopOS 22.04 

### Issue description

The lines drawn to show what the UV1 or UV2 maps look like are way too thick and end up taking up the entire viewport. 

_Beta 13_
![Screenshot from 2023-01-18 13-18-38](https://user-images.githubusercontent.com/16521339/213297096-2e164dc7-355a-4266-821b-99ff21853a77.png)

_Master with a8cbb6245b53955883d8cbeee43524f7bf9fa4af reverted (looks the same in beta 12 and below_
![Screenshot from 2023-01-18 13-16-51](https://user-images.githubusercontent.com/16521339/213297100-415ffde1-972b-428f-b847-5aa64a32c7d2.png)

Regression introduced by https://github.com/godotengine/godot/pull/69851
cc @dalexeev 

Fix is probably going to be removing the editor scaling here: https://github.com/godotengine/godot/blob/6ca1bf9589404b7643d8bf6cfb114dacf537f67b/editor/plugins/mesh_instance_3d_editor_plugin.cpp#L463

### Steps to reproduce

Click on an object with at least a UV map then select "mesh > View UV1"

### Minimal reproduction project

Not project specific
mesh_editor->edit(Object::cast_to<MeshInstance3D>(p_object));
}
bool MeshInstance3DEditorPlugin::handles(Object *p_object) const {
	return p_object->is_class("MeshInstance3D");
}
void MeshInstance3DEditorPlugin::make_visible(bool p_visible) {
	if (p_visible) {
		mesh_editor->options->show();
	} else {
		mesh_editor->options->hide();
		mesh_editor->edit(nullptr);
	}
}
MeshInstance3DEditorPlugin::MeshInstance3DEditorPlugin() {
	mesh_editor = memnew(MeshInstance3DEditor);
	EditorNode::get_singleton()->get_main_screen_control()->add_child(mesh_editor);
	mesh_editor->options->hide();
}
MeshInstance3DEditorPlugin::~MeshInstance3DEditorPlugin() {
}