Feature: Settings dialog update

[yaira2]

Changes

• Custom themes now apply to the settings dialog
• Removed the background from the content area
• Added headers to the setting pages
• Added more spacing between sections

Validation
How did you test these changes?

• Did you build the app and test your changes?
• Did you check for accessibility? You can use Accessibility Insights for this.
• Did you remove any strings from the en-us resource file?
  • Did you search the solution to see if the string is still being used?
• Did you implement any design changes to an existing feature?
  • Was this change approved?
• Are there any other steps that were used to validate these changes?
  1. Open app
  2. Click settings button
  3. Tested that custom themes apply to the settings dialog
  4. Tested in light and dark mode
  5. Tested that each settings page has the correct header and spacing

Screenshots (optional)