Remove dark appearances from light appearances section (and in dark appearances) in themes settings

[luah5]

Description

this PR fixes a bug where dark appearances would appear in the light appearances section and light appearances would appear in the dark appearances section.

Related Issues

• close 🐞 Light appearances in dark appereances sections (& vice versa) in Themes Settings #1373

Checklist

• I read and understood the contributing guide as well as the code of conduct
• The issues this PR addresses are related to each other
• My changes generate no new warnings
• My code builds and runs on my machine
• My changes are all related to the related issue above
• I documented my code

Screenshots

Before:

After:

[austincondiff]

This is not a bug and is expected behavior. If you notice, in light mode the light themes are at the top and in dark mode the dark themes are at the top. Some people like having a dark theme in light mode. We don't want to assume users do not want this. Closing this PR.