[summaryq] Remove memory leak

Don't use a vector of pointers, it is too easy (like when calling clear())
to leak memory.

src/modules/summaryq/Config.cpp

@@ -39,7 +39,7 @@ SummaryModel::data( const QModelIndex& index, int role ) const
         return QVariant();
     }
     const auto item = m_summary.at( index.row() );
-    return role == Qt::DisplayRole ? item->title : item->message;
+    return role == Qt::DisplayRole ? item.title : item.message;
 }
 
 int
@@ -49,22 +49,22 @@ SummaryModel::rowCount( const QModelIndex& ) const
 }
 
 void
-SummaryModel::setSummary( const Calamares::ViewStepList& steps )
+SummaryModel::setSummary( const Calamares::ViewStepList& steps, bool withWidgets )
 {
-    m_summary.clear();
     Q_EMIT beginResetModel();
+    m_summary.clear();
 
     for ( Calamares::ViewStep* step : steps )
     {
         QString text = step->prettyStatus();
-        QWidget* widget = step->createSummaryWidget();
+        QWidget* widget = withWidgets ? step->createSummaryWidget() : nullptr;
 
         if ( text.isEmpty() && !widget )
         {
             continue;
         }
 
-        m_summary << new StepSummary { step->prettyName(), text };
+        m_summary << StepSummary { step->prettyName(), text, widget };
     }
     Q_EMIT endResetModel();
 }

src/modules/summaryq/Config.h

@@ -18,10 +18,18 @@
 
 class SummaryQmlViewStep;
 
+
+/** @brief Data for one step
+ *
+ * A step generally has a text description, but **may** have a
+ * QWidget. There is no ownership of the QWidget, that is assumed
+ * to be handed off to some owning parent-widget.
+ */
 struct StepSummary
 {
     QString title;
     QString message;
+    QWidget* widget = nullptr;
 };
 
 class SummaryModel : public QAbstractListModel
@@ -32,13 +40,13 @@ public:
     int rowCount( const QModelIndex& = QModelIndex() ) const override;
     QVariant data( const QModelIndex& index, int role ) const override;
 
-    void setSummary( const Calamares::ViewStepList& steps );
+    void setSummary( const Calamares::ViewStepList& steps, bool withWidgets = false );
 
 protected:
     QHash< int, QByteArray > roleNames() const override;
 
 private:
-    QVector< StepSummary* > m_summary;
+    QVector< StepSummary > m_summary;
 };
 
 class Config : public QObject, public QQmlParserStatus