personal_menu: Move the theme switcher above the status settings.

[sayamsamal]

This moves the theme switcher from the randomly placed position to the
settings group since it is one of the user preference settings.

CZO Discussion

Screenshots and screen captures:

Before	After

Self-review checklist

• Self-reviewed the changes for clarity and maintainability
  (variable names, code reuse, readability, etc.).

Communicate decisions, questions, and potential concerns.

• Explains differences from previous plans (e.g., issue description).
• Highlights technical choices and bugs encountered.
• Calls out remaining decisions and concerns.
• Automated tests verify logic where appropriate.

Individual commits are ready for review (see commit discipline).

• Each commit is a coherent idea.
• Commit message(s) explain reasoning and motivation for changes.

Completed manual review and testing of the following:

• Visual appearance of the changes.
• Responsiveness and internationalization.
• Strings and tooltips.
• End-to-end functionality of buttons, interactions and flows.
• Corner cases, error conditions, and easily imagined bugs.

[sayamsamal]

@timabbott this should be a quick merge, only moved some lines of code.

(Edit: There may be some discussion still on the way, so removed the integration label)

[alya]

Can you resolve the conflicts so that we can get this merged, please?

[sayamsamal]

@timabbott @alya I have removed the merge conflicts and updated the PR to move the theme switcher to the settings group, following the latest discussions at CZO.

[timabbott]

I'm going to let you resolve the merge conflict, since there's an actual decision to me made there.

[sayamsamal]

@timabbott I have resolved the merge conflict, ready for integration.

[timabbott]

Merged, thanks @sayamsamal!