fix: set correct classes for settings and setting hints

[wofferl]

• Resolves: # [NC28, News 25.X] Updating fields in admin settings not possible #2533

Summary

This fixes the TypeError when changing admin settings.

TypeError: this.$refs.field is undefined
    mounted index.mjs:35
    VueJS 9
    js</<.on["update:checked"]< AdminSettings.vue:1

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Changelog entry added for all important changes.

[Grotax]

Hey thanks for this!

If you can, next time you make commits set the -s option so git commit -s -m ... ..... Or if you use some tool they will probably have some option to say commit with SignOff.

See here https://github.com/src-d/guide/blob/master/developer-community/fix-DCO.md