Added example categories and fixed some minor typos as well. Task-number: QTBUG-116359 Change-Id: I2e270a1919003f4cea233666b64437e4c2b77121 Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io> (cherry picked from commit 7ef93cbf6883af053b1bdf042975b11a39f0312b) Reviewed-by: Kai Köhne <kai.koehne@qt.io>