ScrollContainer internal ScrollBars exposed when saved as a separate scene

[rafallus]

Godot version

Master ed300d7

System information

Arch Linux

Issue description

When using the 'Save Branch as Scene' option with a ScrollContainer, the saved scene shows the internal children of ScrollContainer, i.e. the horizontal and vertical scroll bars

Steps to reproduce

• Add ScrollContainer node to a scene
• Select 'Save Branch as Scene' in the contextual menu from the node tree
• Open the new scene

Minimal reproduction project

No response

[Calinou]

This is likely a case that wasn't handled in #30391.

cc @KoBeWi

[KoBeWi]

It doesn't look related to my PR. #30391 only made the scrollbars hidden from accessing via script. In the case here it seems like the editor is setting their owner for whatever reason.

[KoBeWi]

This is regression from #45937
CC @revilo

[revilo]

@KoBeWi
I confirm, thanks for pointing out!
When I replaced the usage of duplicate_and_reown by duplicate_from_editor for "Save branch as scene" to fix #45937, I had to setup the node owners in the same way as duplicate_and_reown did previously. It seems that I haven't done it in the right way obviously. Will have a deeper look into this ASAP.