3.5 rc1 editor layout loading is broken

[mieldepoche]

Godot version

v3.5.rc1.official.e86d840d4

System information

linux

Issue description

Editor layout loading is broken in rc1 (things used to work fine in beta 5):

1. you can load the default layout
2. but to load the nth custom layout, you must press the n+1th option

Note that opening a project with a layout set in beta 5 loads the layout correctly.

Steps to reproduce

1. create two different custom layouts
2. try loading the first one: nothing happens
3. try loading the second one: the first one is loaded

35_editor_layout-2022-05-20_15.34.19.mp4

Minimal reproduction project

No response

[Calinou]

Duplicate of #61179 (fixed by #61181 in the latest 3.x branch).