Description

Updates the file type check to correctly sort files that haven't been given a UTType, as is often the case with some source files (like JSX).

Related Issues

• closes 🐞 Source editor disappears when deleting all text #1722

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