fix: switch to system theme when returning from create/import profile

[w3ea]

Summary

https://app.clickup.com/t/nkdvrd

Checklist

• [x] My changes look good in both light AND dark mode
• [ ] The change is not hardcoded to a single network, but has multi-asset in mind
• [ ] I checked my changes for obvious issues, debug statements and commented code
• [ ] Documentation (if necessary)
• [ ] Tests (if necessary)
• [x] Ready to be merged