Dive list: update position of trip if data changed

If the date of a dive changed, it might be necessary to reorder
the trips, as the date of the trip changed. Although this seems
like an odd usecase, move the trip if necessary, for consistency's
sake.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

qt-models/divetripmodel.h

@@ -115,6 +115,7 @@ private:
 
 	// Addition and deletion of dives
 	void addDivesToTrip(int idx, const QVector<dive *> &dives);
+	void topLevelChanged(int idx);
 
 	dive *diveOrNull(const QModelIndex &index) const;	// Returns a dive if this index represents a dive, null otherwise
 	dive_or_trip tripOrDive(const QModelIndex &index) const;