Duplicating an audio bus does not make duplicated AudioEffects unique

[ProgrammerOnCoffee]

Tested versions

Reproducible in: v4.3.stable

System information

Godot v4.3.stable - Windows 10.0.19045

Issue description

When duplicating an audio bus, the effects on the duplicated bus are not made unique.

Steps to reproduce

1. Navigate to the Audio bottom panel
2. Add an AudioEffect to the Master bus
3. Duplicate the Master bus
4. Change any property of the AudioEffect of either bus

• The property of the effect on the other bus will also be changed, showing that the effect was not made unique.

Minimal reproduction project (MRP)

N/A

[ProgrammerOnCoffee]

I don't have experience with C++, but this issue might be solved by duplicating the effect here.

[AThousandShips]

Not entirely sure if the initial duplication is by design or desired, but the main issue is that there's no way to duplicate or make the effect unique (as far as I could find) so it makes it very hard to work with this