Godot editor prevents screen from going to sleep

[Uxeron]

Godot version

v4.0.beta6.official [7f8ecff]

System information

Windows 10

Issue description

While the Godot editor is open, the screen will never go to sleep and will always remain ON.
This seems to be caused by the setting display/window/energy_saving/keep_screen_on being enabled by default. This makes sense for a game, however, it's enabled for the editor too, with no way to disable it.

Steps to reproduce

Check your screen sleep delay (on Windows 10: Settings -> System -> Power & sleep)
Open the Godot editor and leave the computer idle for a while.
Notice how the screen remains awake, even after enough time has passed.

Alternatively

Run powercfg /requests in Windows command prompt.
Notice that it mentions "Godot Engine running with display/window/energy_saving/keep_screen_on = true" under [DISPLAY], while referencing the editor executable by path.

Minimal reproduction project

N/A

[Calinou]

Can you reproduce this on 3.5.1?

Either way, the project setting should be ignored in the editor and the editor should never keep the screen on (except if a progress operation is currently ongoing, such as importing resources or baking lightmaps).

[Uxeron]

I cannot reproduce this on 3.5.1, the screen turns off properly and powercfg does not report any locking.

[RedMser]

There is an editor feature override for this setting, but it is not handled by the editor. See #64100

[Calinou]

I can confirm this on 4.0.beta8 (Linux).

[vancura]

The same issue is on macOS (v4.0.beta10.mono.official [d0398f62f] on macOS 13.2). It prevents monitor sleep when the screensaver runs; even LoginWindow can't get the screen to sleep.

EDIT: Same with the non-mono version.

[Calinou]

There is an editor feature override for this setting, but it is not handled by the editor. See #64100

This can be fixed by disregarding the setting within the editor (by checking for Engine::get_singleton()->is_editor_hint() where the setting is used), and removing the .editor override. In general, I think running the project from the editor is expected to prevent sleeping. What shouldn't prevent sleeping is the editor itself.

[Uxeron]

Fixed by #71325.