Make the Text on the DiveList be 30% smaller than other text

This makes the DiveList be similiar to the GTK one, comparing
the size of the text. The current code makes text on the
table be 30% smaller.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Removed unused GTK calls onto the Qt version

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>