Interface loads with dark theme even when 'dark_theme' is set to false

[mamei16]

Describe the bug

When changing to the light theme and saving the setting as dark_theme: false in settings.yaml, the interface will startup in dark mode.
It seems to be caused by "dark" being present in document.body.classList at startup, even when dark_theme: false is saved in settings.yaml.
A related issue mentioning this problem is #4054.
I'll create a PR.

Is there an existing issue for this?

• I have searched the existing issues

Reproduction

Put dark_theme: false into the settings.yaml file and start the webUI. It will still be in dark mode.

Screenshot

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Logs

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System Info

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