Only replot the dive if maxDepth > oldMaxDepth on plan / add mode.

This fixes the "impossible to work with" planner with the mouse
now the dive will only grow and not shrink untill you release
the mouse.

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

qt-ui/diveplanner.cpp

@@ -258,6 +258,18 @@ void DiveHandler::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 	emit moved();
 }
 
+void DiveHandler::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+	QGraphicsItem::mousePressEvent(event);
+	emit clicked();
+}
+
+void DiveHandler::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+	QGraphicsItem::mouseReleaseEvent(event);
+	emit released();
+}
+
 DivePlannerWidget::DivePlannerWidget(QWidget *parent, Qt::WindowFlags f) : QWidget(parent, f)
 {
 	ui.setupUi(this);