Dive list model: send changed signals for top-level items

In analogy to the tree-model send signals when dives change
their shown status in the list-view. Do this in two passes
(collect changes; send changes) to be able to reuse the
already existing functions.

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

qt-models/divetripmodel.cpp

@@ -1320,6 +1320,12 @@ dive *DiveTripModelList::diveOrNull(const QModelIndex &index) const
 
 void DiveTripModelList::recalculateFilter()
 {
+	// Collect the changes in a vector used later to send signals.
+	// This could be solved more efficiently in one pass, but
+	// doing it in two passes allows us to use a common function without
+	// resorting to co-routines, lambdas or similar techniques.
+	std::vector<char> changed;
+	changed.reserve(items.size());
 	{
 		// This marker prevents the UI from getting notifications on selection changes.
 		// It is active until the end of the scope. See comment in DiveTripModelTree::recalculateFilter().
@@ -1332,6 +1338,9 @@ void DiveTripModelList::recalculateFilter()
 		}
 	}
 
+	// Send the data-changed signals if some items changed visibility.
+	sendShownChangedSignals(changed, noParent);
+
 	emit diveListNotifier.numShownChanged();
 	emit diveListNotifier.filterReset();
 }