May be moved in subtasks for now just as a note:
- Trusted Root certificates are no longer highlighted
- Replace KDTextWidget with QTextWidget (fixes some crashes and makes some other stuff copy / pasteable)
- In certificate details move certify into a button and add checkboxes for that.
- In certificate creation remove comment. Make Name Optional.
- Show expert options also in GnuPG System config page.
- Check Windows layout for small improvements (esp. File sign / encrypt)