settings_ui: Add some design tweaks (#40818)

- Improves the UI for subfields of dynamic items
- Makes description writing more consistent (add period at the end of
every sentence, fix capitalization of proper names, ensure description
is always in sentence case)
- Other small details, mostly around spacing/padding

Release Notes:

- N/A
a71cc6a1e7Danilo Leal committed on 10/21/2025, 6:27:44 PM· committed by GitHubparent2764c51
2 files changedLine totals unavailable