Sound file import loop error

[CHIESOFTWARE]

Godot version:
3.2.2

OS/device including version:
Ubuntu Studio 20.04 lts

Issue description:
i import some audio file whit the loop option on, if i disabled this option in the inspector the music loop over and over again, to fix that i must re-import the audio files disabling the loop option. The same happens when importing audio files whit the loop option disabled.

Steps to reproduce:
just import a file whit the loop option on or off and try to disable this option in the inspector, the audio file will keep the imported value.

[Calinou]

Duplicate of #40359.