⚠️ Requires at least Files app¹ version 3.9.0 ⚠️

- Disable accountchooser after added a new account
- Enable ripple effect on selecting a note
- Handle not installed Files app more gracefully
- Fix some codacy issues

Special thanks to @dan0xii @korelstar and @tobiasKaminsky

¹ https://github.com/nextcloud/android