rectify behavior on model reset

GUI/Models/SampleListModel.cpp

@@ -26,14 +26,11 @@
 SampleListModel::SampleListModel(QObject* parent, SampleModel* model)
     : QAbstractListModel(parent), m_sampleModel(model)
 {
-    connect(m_sampleModel, &SampleModel::modelAboutToBeReset, this, &SampleListModel::clear,
-            Qt::UniqueConnection);
-}
+    connect(m_sampleModel, &SampleModel::modelAboutToBeReset, this,
+            &SampleListModel::beginResetModel, Qt::UniqueConnection);
 
-void SampleListModel::clear()
-{
-    beginResetModel();
-    endResetModel();
+    connect(m_sampleModel, &SampleModel::modelReset, this, &SampleListModel::endResetModel,
+            Qt::UniqueConnection);
 }
 
 MultiLayerItem* SampleListModel::topMostItem() const

GUI/Models/SampleListModel.h

@@ -45,9 +45,6 @@ public:
     QModelIndex createSampleFromExamples(const QString& className, const QString& title,
                                          const QString& description);
 
-private:
-    void clear();
-
 private:
     SampleModel* m_sampleModel = nullptr;
 };