Show indication on settings causing a restart

[DL6ER]

What does this implement/fix?

Add red redo-icon on advanced settings page for settings requiring a restart of FTL

Related issue or feature (if applicable): N/A

Pull request in docs with documentation (if applicable): N/A

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[yubiuser]

Does it need to be added manually here?

[PromoFaux]

Does it need to be added manually here?

I think not, should be able to do this in the same way I've done it over on new/env_vars_readonly (likewise, we can maybe do the same for advanced)

[PromoFaux]

Actually, I like that a lot. I'll implement it

[PromoFaux]

See here: f201ad4 (this commit can be moved to a separate PR after the other one is merged if preferred, but might as well do it all in the same place)

[github-actions]

This pull request has conflicts, please resolve those before we can evaluate the pull request.

[DL6ER]

Implemented by #2787

[yubiuser]

misc.privacylevel does not show the indicator.