This just adds the texts for the gas profile. I've also added a method on
the dataModel() to return the diveId of the last used dive in a way that
the other methods can use it.
This code is almost 1-to-1 with the old one, a bit of thinkering can be
used to merge this loop with the upper one.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>