Allows changing text case

[datgausaigon]

• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

In Sharp's Text Tab, there is no Text Case format (Lower Case, Upper Case, Title Case). This makes it more or less difficult to style the Sharps as the design we want.
If possible, please add this feature.

Thanks
🐻