Explain some Settings in Personal/Admin Settings

[MariusBluem]

The idea is to

• put the information i behind more configuration options (e.g.) theming and link to a specific part of the documentation ... for settings currently not documented, it should be considered to do that 😅
• Explain the settings with 1-2 sentences (e.g. that theming is changing colors of folders,...)

Same for Spreed, Updater, ...

Maybe @jacboy also wants to step-in here 🤔

cc @jancborchardt @karlitschek

[MariusBluem]

cc @ChristophWurst here because of the many questions in twofactor_totp why clients are not longer working (app passwords) 😅🙈

[MorrisJobke]

@MariusBluem Could you check this again? We added a lot of hints to all settings in the past days. Could you please write down for which settings the info is missing or close this ticket. Thanks 👍

[MariusBluem]

@MorrisJobke On it 😉

[MorrisJobke]

Let's close this for now until more specific items are listed.